Seismic Event Dossier•09:35 Local (15:35 UTC)(31y ago)

M 8.0 earthquake
Manzanillo, Colima, Mexico

A magnitude 8.0 (MW) earthquake occurred on 1995-10-09, 09:35 local time (15:35 UTC) (31y ago), centered Near Manzanillo (Mexico). The hypocenter was located at a shallow depth of 33 km. Primary telemetry verified by USGS.

Historical Landmark Earthquake

#84 of All Time

Curated Global Seismic Archive (1700–Present)

Top-100 Earthquakes

A magnitude 8.0 earthquake struck ⁨Manzanillo, Colima, Mexico⁩ on 1995年10月9日. Source: ⁨Middle America Trench megathrust⁩. Documented deaths: 50.

Documented Fatalities50Source: NOAA NCEI Significant Earthquake Database

Fault KinematicsActive Fault

Equivalent Energy15.08 Mt TNT

マグニチュード

M 8.0

15.08 Mt TNT

震源の深さ

33 km

shallow (浅発・地殻内)

PAGER影響評価

red

> 1,000 fatalities

負傷者数: > 5,000 · ~46.5M 人が体感

震央・断層インタラクティブマップ

19.05°N, 104.20°W

断層5 km

Middle America Trench megathrust

Active Fault · ~15.0 mm/yr

Felt byMMI III+

~46.5M exposed

~9.2M strong shaking

Primary SolutionUSGS

USGS#usp00074vcreviewed

1 agencies reporting

Setting19.1°N

Mexico

Continental / Inland crustal

Seismic Activity & Aftershock Sequence

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

Hover or tap a point to inspect aftershocks and risk probability curve.

<35 km (浅発・被害大)35–70 km（やや深い）>70 km (深発地震)本震

MLリスク予測:12h40%24h54%72h70%7d87%

Situation Monitoring

Continuous verification

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

Key facts so far

Casualties

Damage assessment in progress

Tsunami Status

No tsunami threat

NOAA PTWC & regional buoys

Citizen Felt Reports

No felt reports submitted

Macroseismic DYFI verification

Aftershock Sequence

Aftershocks: 15

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 / Source	Magnitude (Scale & Diff)	Depth & Diff	Epicenter & Shift (Δd)	Consensus	Event ID / Data
USGS United States Geological Survey · Global / US	M8.0(Mw)Ref	33.0 kmRef	19.05°, -104.20°Origin	Authoritative	usp00074vc

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 か所の集落

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

Town	Distance	Intensity	人口
Manzanillo · Colima	12 km	MMI X	110,735
Tecoman · Colima	37 km	MMI IX	91,321
Colima · Colima	55 km	MMI IX	223,287
Autlan · Jalisco	81 km	MMI VIII	47,669
Ciudad Guzman · Jalisco	107 km	MMI VIII	92,161
Apatzingán · Michoacán	195 km	MMI VII	98,422

Tectonic setting

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

M 8.0 earthquake Manzanillo, Colima, Mexico