Seismic Event Dossier•02:50 Local (18:50 UTC)(agora mesmo)

Earthquake near
Pingtung, Taiwan

A magnitude 7.8 (MW) earthquake occurred on 1951-11-24, 02:50 local time (18:50 UTC) (agora mesmo), centered 88 km NE of Pingtung (Taiwan). The hypocenter was located at a shallow depth of 30 km. Primary telemetry verified by USGS.

Historical Landmark Earthquake

#72 of All Time

Curated Global Seismic Archive (1700–Present)

Top-100 Earthquakes

Magnitude 7.8 historical earthquake occurring on 1951-11-24 in Taiwan. Associated with the Longitudinal Valley fault (Active Fault). Documented casualties: > 1,000.

Documented Fatalities> 1,000

Fault KinematicsActive Fault

Equivalent Energy7.56 Mt TNT

Magnitude

M 7.8

7.56 Mt TNT

Profundidade

30 km

shallow (Crosta superficial)

Impacto PAGER

red

> 1,000 fatalities

Feridos: > 5,000 · ~55.5M sentido

Mapa interativo do epicentro e das falhas

23.09°N, 121.21°E

Falha5 km

Longitudinal Valley fault

Active Fault · ~15.0 mm/yr

Felt byMMI III+

~55.5M exposed

~33.4M strong shaking

Primary SolutionUSGS

USGS#iscgem894988reviewed

1 agencies reporting

Setting23.1°N

Taiwan

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 (superficial)35–70 km (intermédio)>70 km (profundo)Sismo principal

Previsão de risco ML:12h38%24h51%72h66%7d82%

Verified Disaster & Impact Assessment

Official emergency management data cross-checked against multi-agency wires

Continuous verification

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: 3

High Omori aftershock probability

LightGBM hazard model forecast

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	M7.8(Mw)Ref	30.0 kmRef	23.09°, 121.21°Origin	Authoritative	iscgem894988

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 localidades

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

Town	Distance	Intensity	População
Taitung · Taitung	38 km	MMI IX	175,000
Pingtung · Pingtung	88 km	MMI VIII	503,530
Chiayi · Chiayi City	90 km	MMI VIII	500,000
Douliou · Yunlin	97 km	MMI VIII	106,653
Taibao · Chiayi	98 km	MMI VIII	35,000
Tainan · Tainan City	104 km	MMI VIII	1,876,312

Tectonic setting

Nearest mapped active fault: Longitudinal Valley fault, 5 km away, slip rate ~15.0 mm/yr (GEM Global Active Faults).

Earthquake near Pingtung, Taiwan