Seismic Event Dossier•06:59 Local (12:59 UTC)(à l'instant)

M 7.7 earthquake
Manzanillo, Colima, Mexico

A magnitude 7.7 (MW) earthquake occurred on 1932-06-22, 06:59 local time (12:59 UTC) (à l'instant), centered 22 km N of Manzanillo (Mexico). The hypocenter was located at a shallow depth of 25 km. Primary telemetry verified by USGS.

Historical Landmark Earthquake

#100 of All Time

Curated Global Seismic Archive (1700–Present)

Top-100 Earthquakes

A magnitude 7.7 earthquake struck ⁨Manzanillo, Colima, Mexico⁩ on 22 juin 1932. Documented deaths: 75.

Documented Fatalities75Source: NOAA NCEI Significant Earthquake Database

Fault KinematicsActive fault

Equivalent Energy5.35 Mt TNT

Magnitude

M 7.7

5.35 Mt TNT

Profondeur

25 km

shallow (Croûte superficielle)

Impact PAGER

red

> 1,000 fatalities

Blessés: > 5,000 · ~80.1M ressenti

Carte interactive de l'épicentre et des failles

19.24°N, 104.38°W

Faille87 km

Segment de faille active

Slip · ~15.0 mm/yr

Felt byMMI III+

~80.1M exposed

~7.1M strong shaking

Primary SolutionUSGS

USGS#iscgem906247reviewed

1 agencies reporting

Setting19.2°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 (superficiel)35–70 km (intermédiaire)>70 km (profond)Choc principal

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

Monitoring

Aftershocks expected (Omori law)

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	M7.7(Mw)Ref	25.0 kmRef	19.24°, -104.38°Origin	Authoritative	iscgem906247

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 localités

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

Town	Distance	Intensity	Population
Manzanillo · Colima	22 km	MMI IX	110,735
Autlan · Jalisco	59 km	MMI VIII	47,669
Tecoman · Colima	64 km	MMI VIII	91,321
Colima · Colima	70 km	MMI VIII	223,287
Ciudad Guzman · Jalisco	110 km	MMI VII	92,161
Puerto Vallarta · Jalisco	183 km	MMI VII	187,134

Tectonic setting

Nearest mapped active fault: Segment de faille active, 87 km away, slip rate ~15.0 mm/yr (GEM Global Active Faults).

M 7.7 earthquake Manzanillo, Colima, Mexico