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HISTORICAL TSUNAMI RECORDSeptember 8, 2017

Major Ocean Tsunami Generated (Historical Record)

This undersea earthquake generated recorded tsunami waves across coastal and trans-oceanic sectors. Preserved in seismic archive for scientific reference — no active hazard exists.

Seismic Event Dossier22:49 Local (04:49 UTC)(9y ago)

M 8.2 earthquake Off the coast of Escuintla, Mexico

A magnitude 8.2 (MW) earthquake occurred on 2017-09-08, 22:49 local time (04:49 UTC) (9y ago), centered Off the coast of Escuintla (140 km W, Mexico). The hypocenter was located at a intermediate depth of 47.4 km. Primary telemetry verified by USGS.

Historical Landmark Earthquake

#45 of All Time

Curated Global Seismic Archive (1700–Present)

Top-100 Earthquakes

A magnitude 8.2 earthquake struck ⁨Off the coast of Escuintla, Mexico⁩ on 8 سبتمبر 2017. Source: ⁨Middle America Trench megathrust⁩. Documented deaths: 98.

Documented Fatalities98Source: NOAA NCEI Significant Earthquake Database
Fault KinematicsActive Fault
Equivalent Energy30.09 Mt TNT

القدر

MW
M 8.2

30.09 Mt TNT

العمق

47.4 km
47.4 km

intermediate (35–70 كم (متوسط العمق))

أثر PAGER

red
> 1,000 fatalities

الإصابات المقدرة: > 5,000 · ~38.2M محسوس

خريطة تفاعلية للبؤرة السطحية والصدوع

15.02°N, 93.90°W
فالق5 km
Middle America Trench megathrust
Active Fault · ~15.0 mm/yr
Felt byMMI III+
~38.2M exposed
~8.9M strong shaking
Primary SolutionUSGS
USGS#us2000ahv0reviewed
1 agencies reporting
Setting15.0°N
Acapulco, غيريرو & Chiapas
Offshore / Marine rupture

Seismic Activity & Aftershock Sequence

Timeline of foreshocks, main rupture, aftershocks and machine learning risk probability evolution.

M0.0M4.5M9.0100%50%0%الهزة الرئيسية11 سبتمبر16 سبتمبر21 سبتمبر26 سبتمبر1 أكتوبرM8.2
Hover or tap a point to inspect aftershocks and risk probability curve.
<35 كم (ضحل)35–70 كم (متوسط العمق)>70 كم (عميق)الهزة الرئيسية
توقعات مخاطر تعلم الآلة:12h41%24h55%72h71%7d89%

Situation Monitoring

Continuous verification
Multi-agency verification of casualties, tsunami alerts, and seismic sequence

Key facts so far

Casualties
None expected (offshore epicenter)
Zero exposed population
Tsunami Status
TSUNAMI WARNING
NOAA PTWC & regional buoys
Citizen Felt Reports
0
Not felt / offshore epicenter
Macroseismic DYFI verification
Aftershock Sequence
Aftershocks: 50
High Omori aftershock probability
LightGBM hazard model forecast
Multi-agency seismic telemetry active. Awaiting wire headlines.

Agency Discrepancy Matrix (Cross-Network Verification)

Comparing multi-network solutions from primary and teleseismic monitoring agencies.

Network / SourceMagnitude (Scale & Diff)Depth & DiffEpicenter & Shift (Δd)ConsensusEvent ID / Data
USGS
United States Geological Survey · Global / US
M8.2(Mw)Ref
47.4 kmRef
15.02°, -93.90°Origin
Authoritative
us2000ahv0

Why do agency magnitudes differ? Seismological agencies use different instrumentation networks, crustal velocity models, and mathematical magnitude scales (e.g. Moment Magnitude Mw vs Local Richter ML vs Surface Wave Ms). Differences of 0.1–0.3 are common and reflect physical observation geometry rather than errors.

Where it was felt

6 تجمعات سكانية

Shaking intensity is modelled from magnitude, depth and distance (GMPE attenuation), not reported by residents.

TownDistanceIntensity
Pijijiapan · Chiapas104 kmMMI VIII
Escuintla · Chiapas141 kmMMI VIII
Tapachula · Chiapas176 kmMMI VII
Salina Cruz · Oaxaca189 kmMMI VII
Juchitan · Oaxaca197 kmMMI VII
Tehuantepec · Oaxaca204 kmMMI VII

Tectonic setting

Nearest mapped active fault: Middle America Trench megathrust, 5 km away, slip rate ~15.0 mm/yr (GEM Global Active Faults).

الملف الزلزالي الإقليمي

Acapulco, غيريرو & Chiapas

استعرض المراقبة الزلزالية الحية، ومعايير الخطر التاريخية، ونماذج انزلاق الفوالق وفترات التكرار لهذه المنطقة.