Credible Risk
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Seismic design parameters live USGS
Response spectra Design + MCE R
Terrain section → nearest active fault real elevations
Historic earthquakes · 50 km M4.5+ since 1900 · live USGS
Multi-hazard screening live FEMA · CAL FIRE · DSOD · CGS · CoSMoS
Regional risk context FEMA NRI · census tract
Scenario exposure USGS ShakeMap · reported values
Data: USGS Quaternary Fault & Fold Database · Est. Mmax per Wells & Coppersmith (1994)
Vertical ⓘ
Geologic maps USGS & state surveys · published sheets
Scale ⓘ
Show ⓘ
Opacity
gaps show the basemap
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Seismic & multi-hazard screening

Where’s the site?

Search any U.S. address to get nearest active faults, code design values, historic earthquakes, and multi-hazard screening — in seconds.

…or just click anywhere on the map to drop a site.

0 Quaternary faults within 25 km

age classes ⓘ
Distance Dir Fault Age Slip sense Slip rate Est. Mmax
MagYearEvent / locationDepthDistanceDir
Credible Risk Copilot
Answers are re-derived from the same sources as the panels, and cite them. Screening support — not a hazard analysis, and not professional judgement.

Portfolio screening

Rank a program of sites by Seismic Screening Index — triage which assets need site-specific investigation first. One site per line: label, lat, lng

Sample the same sites against a USGS ShakeMap — a planning scenario or a real event. MMI and PGA are reported USGS values, ranked by shaking intensity.

SSI components: active-fault proximity (40) · regional est. Mmax (25) · Alquist-Priolo screening (20) · historic seismicity (15). Screening triage only — not a hazard analysis.
Report verification

Verify any report

Credible Risk re-derives each claim against the live authoritative source and shows you which ones hold — with the exact government query behind every answer.

Drop the report PDF hereChoose the report PDF
or click to choose a filetap to pick it from your device  ·  up to 25 MB, 250 pages
…or paste the report text instead
The reader transcribes what the document states — it never decides whether a claim is right. Every extracted claim is quoted and page-referenced, then checked by the same deterministic engine as a hand-entered one.
No site set — enter the address the report covers.
Linear / multi-point site levees, landfills, alignments — verify claims across the whole site, not one pin
The site above is point 1. Claims about what the site is in hold if they hold at any point; claims of absence must hold at every point. Up to 5 additional points.
Basis stated in the report
These aren’t checked — they’re the basis the report used, so the re-derivation asks the same question it did.

Faulting & regulatory zones

Seismic design values

Enter values exactly as the report prints them — the check is run at the precision stated.

Other hazards

Verification checks determinations against the sources as published right now. A discrepancy can mean the report is wrong — or that a map, code edition, or dataset changed after it was written. Screening aid; not a peer review.
Report verification

Checking claims…

Drop the report anywhere
Credible Risk will read the determinations it states and check each one
Faulting & Seismicity Screening Report