lbl.gov — Home – Lawrence Berkeley National Laboratory

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Home – Lawrence Berkeley National Laboratory

UC Names Katherine Yelick to Head Lawrence Berkeley National Laboratory

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DESI Completes Planned 3D Map of the Universe and Continues Exploring

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AI for Science, Energy, and Security: Supporting DOE's Genesis Mission

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Science Solutions for the World

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Innovating for Impact

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◈ Homepage — https://www.lbl.gov/Skip to main content UC Names Katherine Yelick to Head Lawrence Berkeley National Laboratory DESI Completes Planned 3D Map of the Universe and Continues Exploring AI for Science, Energy, and Security: Supporting DOE's Genesis Mission At Lawrence Berkeley National Laboratory, we are expanding the frontiers of knowledge and delivering solutions for science and humankind. Berkeley Lab’s innovative research and technologies drive real-world impact, transforming industries and improving lives. Explore breakthroughs that are shaping the future and delivering solutions for energy. Berkeley Lab’s Kristin Persson Elected to the American Academy of Arts and Sciences The National Academy of Sciences Elects Two Berkeley Lab Researchers Scientists Develop New Technology to Continuously Monitor Geothermal Energy Operations ◈ Interior Pages — 3 pages crawledBerkeley Lab’s Kristin Persson Elected to the AAAS – Berkeley Lab News Center Skip to main content All News Videos Podcasts Social Media In the News For the Media Media Contact Photos B-Roll All News Videos Podcasts Social Media In the News For the Media Media Contact Photos B-Roll Berkeley Lab’s Kristin Persson Elected to the American Academy of Arts and Sciences Article Materials Kristin Persson, a Daniel M. Tellep Distinguished Professor in Materials Science and Engineering at UC Berkeley and faculty senior scientist at Lawrence Berkeley National Laboratory (Berkeley Lab), has been elected to the American Academy of Arts and Sciences. The prestigious organization honors excellence in science, the humanities and arts, and policy and communication. The Academy, which elected its first members in 1781, recently announced a new cohort of 252 members for 2026. Persson’s work uses high-performance computing to study the physics and chemistry of materials. She is the founder and director of the Materials Project , an open-access database with millions of properties on hundreds of thousands of crystalline structures and molecules. The Materials Project is the most widely used repository of information on inorganic materials in the world, used by hundreds of thousands of people and vital for developing new materials for high-performance batteries, fuel cells, and data storage. The Materials Project’s curated datasets enable AI-powered materials design for faster scientific discoveries. Persson also served as the director of the Molecular Foundry, a nanoscience user facility at Berkeley Lab, from 2020 to 2024. She is a member of the National Academy of Engineers and Royal Swedish Academy of Sciences; a U.S. Department of Energy Office of Science Distinguished Scientist Fellow; and fellow of the Materials Research Society, American Association for the Advancement of Science, and American Physical Society. ### Lawrence Berkeley National Laboratory (Berkeley Lab) is committed to groundbreaking research focused on discovery science and solutions for abundant and reliable energy supplies. The lab’s expertise spans materials, chemistry, physics, biology, earth and environmental science, mathematics, and computing. Researchers from around the world rely on the lab’s world-class scientific facilities for their own pioneering research. Founded in 1931 on the belief that the biggest problems are best addressed by teams, Berkeley Lab and its scientists have been recognized with 17 Nobel Prizes. Berkeley Lab is a multiprogram national laboratory managed by the University of California for the U.S. Department of Energy’s Office of Science. DOE’s Office of Science is the single largest supporter of basic research in the physical sciences in the United States, and is working to address some of the most pressing challenges of our time. For more information, please visit energy.gov/science . Tags: Materials Article Awards Three Berkeley Lab Researchers Named AAAS Fellows Article Awards Two Berkeley Lab Scientists Elected to the National Academy of Engineering Article Awards Former Berkeley Lab Scientist John Clarke Wins 2025 Nobel Prize in Physics Scientists Develop New Technology to Continuously Monitor Geothermal Energy Operations – Berkeley Lab News Center Skip to main content All News Videos Podcasts Social Media In the News For the Media Media Contact Photos B-Roll All News Videos Podcasts Social Media In the News For the Media Media Contact Photos B-Roll Scientists Develop New Technology to Continuously Monitor Geothermal Energy Operations Article Earth Systems Scientists and industry operators like Fervo Energy are developing enhanced geothermal systems (EGS), engineered reservoirs in Earth’s subsurface, to access the constant heat deep underground, where higher temperatures at greater depths can be used to produce affordable, round-the-clock energy. EGS reservoirs can create microseismic events — typically of very low magnitude and rarely felt at Earth’s surface — that can help scientists better understand how rock fractures form to advance geothermal energy production. For seven months, from late July 2025 to February, Lawrence Berkeley National Laboratory (Berkeley Lab) geophysicists continuously monitored microseismic activity nearly 7,000 feet underground — where temperatures reach 338°F — at Fervo Energy’s Utah EGS site, Cape Station. With this effort, a significant breakthrough has been achieved by the Berkeley Lab team in the detailed, long-term monitoring of geothermal reservoirs under high-temperature conditions, with the next highest temperature recorded in the area being 302°F. “Such high-temperature measurements are critical for geothermal energy production, and as far as we know, this is the world’s longest recorded measurement at this temperature,” said Nori Nakata , a Berkeley Lab staff scientist who developed the high-temperature seismometer with Paul Cook , at the laboratory’s Geosciences Measurement Facility (GMF). “If we can advance the science needed to achieve round-the-clock monitoring of EGS operations, it will help expand EGS effectively and safely.” Scaling enhanced geothermal systems with continuous monitoring Since 2023, Fervo Energy’s Cape Station has served as a hub for research advancing geothermal development in southwest Utah, a region where hot subsurface conditions mirror those found throughout the geothermal-rich American West. The Houston-based Fervo Energy, a leading geothermal company and a 2018 participant in Berkeley Lab’s Cyclotron Road entrepreneurial fellowship program, plans to begin delivering the first 100 MW of what will become 500 MW of continuous geothermal power from Cape Station by 2026. Heat exists almost everywhere underground, but many rocks lack the permeability needed for fluid to flow and transfer heat effectively. In EGS, water moves through fractures deep underground, absorbing heat that’s converted to electricity. Most of the sensors used to monitor these flow paths operate at depths less than 131 feet where temperatures are cooler, but researchers are increasingly developing technologies capable of withstanding extreme heat at greater depths, where conditions are most favorable for geothermal energy production. As Nakata notes, “Continuous seismic recording is important to expanding EGS operations. For one, it improves what we know about how rock fractures develop. For example, with more information about microseismicity at greater depths, we can control fluid injection and circulation within the reservoir so it efficiently produces the steam that is converted to electricity.” Continuous monitoring at lower depths also helps by providing a larger catalog of small seismic events, helping scientists better understand and manage induced seismicity. With more data, researchers can improve control of reservoir development and reduce the likelihood of larger events that could be felt at Earth’s surface.   Advancing reliable tools for next-generation geothermal Measuring just under 10 feet long, the seismometer developed at Berkeley Lab’s GMF was deployed 6,995 feet underground on July 27, 2025, through a borehole at Cape Station. Situated beside the U.S. Department of Energy’s Frontier Observatory for Research in Geothermal Energy (FORGE), this site offers Fervo valuable data on reservoir characteristics to better manage and reduce the risk of induced seismic activity. Utah, meanwhile, is among eight states producing geothermal energy, with its first plant dating back to 1984. Fervo continues to carry out regular seismic monitoring to evaluate potential seismic risks. “Developing sensors that can reliably operate at high temperatures is a game-changer for geothermal energy,” says Sireesh Dadi, Manager of Data Acquisition and Advanced Analytics at Fervo Energy. “We’re advancing tools for microseismic monitoring, pressure sensing, and strain sensing that help us better understand reservoir behavior in real time.” Berkeley Lab’s GMF develops and deploys customized geoscience instruments designed to operate in harsh, remote environments for extended periods — such as this seismometer, which is sealed to prevent water seepage and designed without extra components that could fail under intense heat. Geophysicists in Berkeley Lab’s Energy Geosciences Division began studying geothermal energy at The Geysers Field nearly 50 years ago. Since then, they have led collaborations to develop, sustain, and monitor EGS, and to align research with technology and materials advances that have transformed the geothermal landscape. Recently, the team has contributed its expertise to field-scale demonstrations at sites such as Cape Station and Utah FORGE. In other projects funded by DOE, Berkeley Lab researchers are also supporting EGS tests in superhot conditions that exceed 700°F. The team has also developed widely used software to simulate reservoir processes that may help identify promising EGS sites and track reservoir performance over time. By combining advanced modeling with sensors designed to withstand extreme underground heat, scientists are gaining critical insights into how rocks and fluids behave — knowledge essential to expanding geothermal energy. The team is also applying advanced data processing and artificial intelligence to fuse diverse datasets, uncover patterns that would otherwise remain hidden, and support better decision making in reservoir management. “We want to know the true conditions inside a geothermal reservoir, but that’s difficult to see directly,” says Nakata. “For EGS to become a major U.S. energy source, we need a clear understanding of rock stress, permeability, fluid pathways, and fracture growth. These factors are critical both to generate electricity and to avoid unwanted induced seismicity.” This research is supported by the Office of Geothermal at the U.S. Department of Energy. ### Lawrence Berkeley National Laboratory (Berkeley Lab) is committed to groundbreaking research focused on discovery science and solutions for abundant and reliable energy supplies. The lab’s expertise spans materials, chemistry, physics, biology, earth and environmental science, mathematics, and computing. Researchers from around the world rely on the lab’s world-class scientific facilities for their own pioneering research. Founded in 1931 on the belief that the biggest problems are best addressed by teams, Berkeley Lab and its scientists have been recognized with 17 Nobel Prizes. Berkeley Lab is a multiprogram national laboratory managed by the University of California for the U.S. Department of Energy’s Office of Science. DOE’s Office of Science is the single largest supporter of basic research in the physical sciences in the United States, and is working to address some of the most pressing challenges of our time. For more information, please visit energy.gov/science .   Tags: Earth Systems Podcast Earth Systems Fervo Energy: Pioneering Next-Generation Geothermal Power Video Earth Systems Conventional vs. Enhanced Geothermal: What’s the Difference? Podcast Earth Systems Expert Interview: Eva Schill on the Prom The National Academy of Sciences Elects Two Berkeley Lab Researchers – Berkeley Lab News Center Skip to main content All News Videos Podcasts Social Media In the News For the Media Media Contact Photos B-Roll All News Videos Podcasts Social Media In the News For the Media Media Contact Photos B-Roll The National Academy of Sciences Elects Two Berkeley Lab Researchers Article Awards Two Lawrence Berkeley National Laboratory (Berkeley Lab) scientists have been elected to the National Academy of Sciences (NAS) in recognition of their distinguished and continuing achievements in original research. They are part of a cohort of 120 new members and 25 international members. The National Academy of Sciences is a private, nonprofit institution that was established under a congressional charter signed by President Abraham Lincoln in 1863. It recognizes achievement in science by election to membership, and — alongside the National Academy of Engineering and the National Academy of Medicine — provides science, engineering, and health policy advice to the federal government and other organizations. The 2026 electees bring the total number of active members to 2,705 with 557 international members. Gary Karpen is a biologist senior faculty scientist in Berkeley Lab’s Biological Systems and Engineering Division and a Professor of Cell and Developmental Physiology in the Department of Molecular and Cell Biology at UC Berkeley. Karpen studies how the structure, organization, and maintenance of genetic material impact inheritance and cell function. His lab focuses on chromatin — a packaged form of DNA strands wrapped around proteins that comprises our chromosomes — with a particular emphasis on centromeres, rarely expressed sequences called heterochromatin, DNA repair, and regulatory RNAs. His research reveals insights into fundamental aspects of nuclear organization and genome regulation that are shared across the tree of life, broadening our understanding of cancer and other diseases, birth defects, and aging. Kam-Biu Luk is a Professor Emeritus of physics at UC Berkeley and a retired senior faculty scientist in Berkeley Lab’s Physics Division. He is an experimental particle physicist whose research has focused on neutrinos: nearly massless, electrically neutral elementary particles that can pass through matter virtually undetected. Neutrinos are created during radioactive decay processes, including the fusion process occurring in stars and the fission process that powers nuclear reactors. Luk initiated and co-led the Daya Bay Reactor Neutrino Experiment, a project based in China with more than 200 international collaborators. In 2012, the Daya Bay experiment discovered a new form of a phenomenon called “neutrino oscillation” in which neutrinos change from one type to another. For this discovery, Luk and his collaborator Yifan Wang received the 2014 American Physical Society Division of Particles and Fields W.K.H. Panofsky Prize for outstanding work in experimental particle physics, and he was also the co-recipient of the 2016 Breakthrough Prize. Luk is currently participating in the Deep Underground Neutrino Experiment (DUNE) hosted by Fermi National Accelerator Laboratory, which will investigate any potential difference in behavior between neutrinos and antineutrinos that may shed light on the evolution of the universe, especially why antimatter is absent in the present universe. ### Lawrence Berkeley National Laboratory (Berkeley Lab) is committed to groundbreaking research focused on discovery science and solutions for abundant and reliable energy supplies. The lab’s expertise spans materials, chemistry, physics, biology, earth and environmental science, mathematics, and computing. Researchers from around the world rely on the lab’s world-class scientific facilities for their own pioneering research. Founded in 1931 on the belief that the biggest problems are best addressed by teams, Berkeley Lab and its scientists have been recognized with 17 Nobel Prizes. Berkeley Lab is a multiprogram national laboratory managed by the University of California for the U.S. Department of Energy’s Office of Science. DOE’s Office of Science is the single largest supporter of basic research in the physical sciences in the United States, and is working to address some of the most pressing challenges of our time. For more information, please visit energy.gov/science . Tags: Awards Cosmic Frontiers Human Health Article Awards Three Berkeley Lab Researchers Named AAAS Fellows Article Mysteries of Matter Physicists Announce First Results from Daya Bay’s Final Dataset Article Human Health First ‘Telomere to Telomere’ Human Genome Reveals Secrets of the Centromere

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Fitness-related activity designed for a specific health-related purpose, including defined exercise routines as well as activity prescribed by a clinician.

exerciseTypeworkloadintensityrepetitionsactivityFrequencyrestPeriodsadditionalVariableactivityDuration

HowToDirectionsibling via CreativeWorkschema.org/HowToDirection ↗8 exclusive

A direction indicating a single action to do in the instructions for how to achieve a result.

duringMediaprepTimetoolsupplybeforeMediatotalTimeperformTimeafterMedia

RealEstateListingchild / upgradeschema.org/RealEstateListing ↗+2 props

A [[RealEstateListing]] is a listing that describes one or more real-estate [[Offer]]s (whose [[businessFunction]] is typically to lease out, or to sell). The

datePostedleaseLength

MedicalWebPagechild / upgradeschema.org/MedicalWebPage ↗+1 props

A web page that provides medical information.

medicalAudience

QAPagechild / upgradeschema.org/QAPage ↗+0 props

A QAPage is a WebPage focussed on a specific Question and its Answer(s), e.g. in a question answering site or documenting Frequently Asked Questions (FAQs).

ContactPagechild / upgradeschema.org/ContactPage ↗+0 props

Web page type: Contact page.

AboutPagechild / upgradeschema.org/AboutPage ↗+0 props

Web page type: About page.

ProfilePagechild / upgradeschema.org/ProfilePage ↗+0 props

Web page type: Profile page.

CollectionPagechild / upgradeschema.org/CollectionPage ↗+0 props

Web page type: Collection page.

ItemPagechild / upgradeschema.org/ItemPage ↗+0 props

A page devoted to a single item, such as a particular product or hotel.

CheckoutPagechild / upgradeschema.org/CheckoutPage ↗+0 props

Web page type: Checkout page.

SearchResultsPagechild / upgradeschema.org/SearchResultsPage ↗+0 props

Web page type: Search results page.

FAQPagechild / upgradeschema.org/FAQPage ↗+0 props

A [[FAQPage]] is a [[WebPage]] presenting one or more "[Frequently asked questions](https://en.wikipedia.org/wiki/FAQ)" (see also [[QAPage]]).

◈ Structural Negative Type Space — Constitutional Law VI

◈ Action Branch

No structural connection to the Action branch. Graph position measurement. schema.org/Action ↗ · Law III — meaning is yours.

◈ BioChemEntity Branch

No structural connection to the BioChemEntity branch. Graph position measurement. schema.org/BioChemEntity ↗ · Law III — meaning is yours.

◈ Event Branch

No structural connection to the Event branch. Graph position measurement. schema.org/Event ↗ · Law III — meaning is yours.

◈ Intangible Branch

No structural connection to the Intangible branch. Graph position measurement. schema.org/Intangible ↗ · Law III — meaning is yours.

◈ MedicalEntity Branch

No structural connection to the MedicalEntity branch. Graph position measurement. schema.org/MedicalEntity ↗ · Law III — meaning is yours.

◈ Organization Branch

No structural connection to the Organization branch. Graph position measurement. schema.org/Organization ↗ · Law III — meaning is yours.

◈ Person Branch

No structural connection to the Person branch. Graph position measurement. schema.org/Person ↗ · Law III — meaning is yours.

◈ Place Branch

No structural connection to the Place branch. Graph position measurement. schema.org/Place ↗ · Law III — meaning is yours.

◈ Product Branch

No structural connection to the Product branch. Graph position measurement. schema.org/Product ↗ · Law III — meaning is yours.

◈ Taxon Branch

No structural connection to the Taxon branch. Graph position measurement. schema.org/Taxon ↗ · Law III — meaning is yours.

◈ Gap List (49 properties unmapped)

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+19 more gaps not shown

◈ Source Schema.org — Raw Extraction (4 blocks)

Block 1 · @type: unknown

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◈ Source: https://www.lbl.gov/ · Law I — Provenance

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◈ Source: https://newscenter.lbl.gov/2026/05/08/berkeley-labs-kristin-persson-elected-to-the-american-academy-of-arts-and-sciences/ · Fetched: 2026-05-12T18:23:35Z · Law I — Provenance

Block 3 · @type: unknown

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◈ Source: https://newscenter.lbl.gov/2026/04/06/scientists-develop-new-technology-to-continuously-monitor-geothermal-energy-operations/ · Fetched: 2026-05-12T18:23:35Z · Law I — Provenance

Block 4 · @type: unknown

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      "description": "Bringing Science Solutions to the World",
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◈ Source: https://newscenter.lbl.gov/2026/05/07/the-national-academy-of-sciences-elects-two-berkeley-lab-researchers-2/ · Fetched: 2026-05-12T18:23:35Z · Law I — Provenance

schema.org v2.0.0 · source: https://www.lbl.gov/ schema.org/WebPage ↗

Semantic Words 40 words · frequency ranked · Law III

▶ 40 words · top 5: berkeley · lab · energy · science · geothermal · click to expand

Top 40 words by frequency from https://www.lbl.gov/ + 3 interior pages (2,331 words total). Stop-words stripped. Ranked by repetition.

#1berkeley47x · 3.13%

#2lab43x · 2.86%

#3energy34x · 2.26%

#4science24x · 1.6%

#5geothermal24x · 1.6%

#6national21x · 1.4%

#7research18x · 1.2%

#8media18x · 1.2%

#9news15x · 1.0%

#10materials15x · 1.0%

#11academy14x · 0.93%

#12laboratory13x · 0.86%

#13sciences12x · 0.8%

#14scientists12x · 0.8%

#15researchers11x · 0.73%

#16earth11x · 0.73%

#17egs11x · 0.73%

#18world9x · 0.6%

#19article9x · 0.6%

#20lawrence8x · 0.53%

#21physics8x · 0.53%

#22office8x · 0.53%

#23systems8x · 0.53%

#24fervo8x · 0.53%

#25reservoir8x · 0.53%

#26elected7x · 0.47%

#27american7x · 0.47%

#28department7x · 0.47%

#29heat7x · 0.47%

#30underground7x · 0.47%

#31persson6x · 0.4%

#32videos6x · 0.4%

#33podcasts6x · 0.4%

#34social6x · 0.4%

#35photos6x · 0.4%

#36roll6x · 0.4%

#37scientist6x · 0.4%

#38members6x · 0.4%

#39awards6x · 0.4%

#40monitoring6x · 0.4%

Law III — frequency measured, meaning is the reader's · source: https://www.lbl.gov/

Text Topology Fingerprint v1.0.0 · long · 16,733 chars · Law III

Six-layer pre-linguistic shape measurement. Deterministic. Same input, same output, always. Hash: f85db046465595880eda8ebf460a8410...

◈ Signal Matrix

0.399

TTR

0.263

HAPAX

0.737

REP

0.397

BIGRAM

0.658

H2T

0.250

CPRT

2.485

SKEW

6.589

KURT

1.210

C/P

1.409

PENT

0.500

S1P

0.004

NASC

TTR=type-token ratio · HAPAX=hapax ratio · REP=repetition score · BIGRAM=bigram repetition · H2T=hapax-to-type · CPRT=capital token ratio · SKEW=sentence skewness · KURT=sentence kurtosis · C/P=comma-period ratio · PENT=punct entropy · S1P=single-sent para ratio · NASC=non-ASCII ratio

◈ Topology Position

Latin dominant · moderate lexical diversity · mixed register · moderate clause complexity · moderate topic focus · strong uncommon edge signal

◈ Six Measurement Layers

Layer 1 — Character

0.0040

Non-ASCII Ratio

0.0 = Latin-dominant · 1.0 = fully non-Latin script

Layer 1 — Character

3.1665

Character Entropy

Shannon entropy of character distribution.

Layer 1 — Character

'e' (1849x)

Most Frequent

Highest-frequency character. Law V — common edge.

Layer 2 — Token

0.3989

Type-Token Ratio

Unique tokens / total tokens. Lexical diversity signal.

Layer 2 — Token

0.2627

Hapax Ratio

Tokens appearing exactly once. Law VI — uncommon edge.

Layer 6 — Document

0.6585

Hapax to Type

Hapax count / unique token count.

Layer 3 — Punctuation

1.2095

Comma/Period Ratio

Clause complexity per sentence.

Layer 3 — Punctuation

1.4094

Punct Entropy

Shannon entropy across punctuation types.

Layer 4 — Sentence

Sentence Count

Total detected sentences across all crawled pages.

Layer 4 — Sentence

2.4846

Skewness

Positive = long-tail. Negative = conversational.

Layer 5 — Paragraph

0.5000

Single Sent Ratio

High = web copy. Low = academic prose.

Layer 6 — Document

0.7373

Repetition Score

Tokens appearing more than once / total.

◈ Token Length Distribution

1-3

31%

4-6

28%

7-10

34%

11-15

16-20

21+

◈ Density Gradient — TTR per Document Tenth

Front-loaded = abstract/preamble · Flat = consistent prose · Back-loaded = building complexity

◈ Lexical Richness Curve — Rolling Window TTR

Window=50 tokens · Step=25 · 96 data points

topology_fingerprint.py v1.0.0 · sha256: f85db04646559588... · Law III + Law VI

Ratio Signals 8 deterministic measurements · the gap is the signal

Eight deterministic measurements. Law I: every value traces to its source stage.

schema density

0.8250

Schema props extracted / top semantic words.

nav ratio

0.0000

Nav URLs / total internal URLs.

content to structure ratio

0.0445

Total words / raw HTML bytes. Content density.

external tld diversity

Unique TLD count in outbound links.

self declaration coherence

0.1813

Fuzzy overlap across title / H1 / meta / schema name.

schema to nav alignment

0.0000

Schema type tokens vs nav link text overlap.

javascript surface ratio

0.0000

Fraction of interior pages JS-gated.

URL Depth Distribution

depth_0: 6 · depth_1: 16 · depth_2: 3 · depth_3plus: 10

Internal URLs by path depth. Depth 0 = root.

Tech Stack · Security · Freshness SecurityLabel.MODERATE · FreshnessLabel.UNKNOWN

Sitemap: ✗Robots.txt: ✗Schema.org: ✓Open Graph: ✓Canonical: ✓HTTPS: ✓HSTS: ✓CSP: ✓

Security

SecurityLabel.MODERATE

Freshness

FreshnessLabel.UNKNOWN

Server

cloudflare

cms	WordPress
cdn	Cloudflare
web_server	cloudflare
analytics	['Google Analytics', 'Google Tag Manager']
frameworks	['react']

Ledger Appends 13 ledgers · graph edge traversal · Law V+VII

Every ledger this entity appends to. Follow any link to see every other entity in the registry that shares that TLD or schema type. Law VII — Torus. The corridor never ends.

TLD LEDGER

.gov

https://globaldataregistry.com/registry/tld/ledger/gov ↗

SCHEMA LEDGER

webpage

https://globaldataregistry.com/registry/schema/ledger/webpage ↗

SCHEMA LEDGER

readaction

https://globaldataregistry.com/registry/schema/ledger/readaction ↗

SCHEMA LEDGER

breadcrumblist

https://globaldataregistry.com/registry/schema/ledger/breadcrumblist ↗