Seismic Event Dossier10:04 Local (02:04 UTC)(just now)
39.46°N, 96.56°E
USGS•#iscgem906530reviewed

Earthquake near Gansu, China

A magnitude 7.8 (MW) earthquake occurred on 1932-12-25, 10:04 local time (02:04 UTC) (just now), centered 108 km W of Yumen (China). The hypocenter was located at a shallow depth of 15 km. Primary telemetry verified by USGS alongside 1 regional seismic monitoring networks.

Historical Landmark Earthquake

#86 of All Time

Curated Global Seismic Archive (1700–Present)

Top-100 Earthquakes
Magnitude 7.8 historical earthquake occurring on 1932-12-25 in China. Associated with the Unnamed Fault (Active Fault). Documented casualties: > 1,000.
Documented Fatalities> 1,000
Fault KinematicsActive Fault
Equivalent Energy7.56 Mt TNT

Magnitude

MW
M 7.8

7.56 Mt TNT

Depth

15 km
15 km

shallow (Shallow crustal)

PAGER Impact

red
> 1,000 fatalities

Injuries: > 5,000 · ~58.9M felt

Interactive Epicenter & Fault Map

Fault5 km
Unnamed Fault
Active Fault · ~~15.0 mm/yr
Felt byMMI V+
~58.9M exposed
~17M in strong shaking
Primary SolutionUSGS
USGS#iscgem906530reviewed
1 agencies reporting
Geological Setting39.5°N
China
Continental / Inland crustal

Seismic Activity & Aftershock Sequence

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

M0.0M4.5M9.0100%50%0%MainshockDec 24, 04 PMDec 25, 04 AMDec 25, 04 PMDec 26, 04 AMDec 26, 04 PMDec 27, 04 AMDec 27, 04 PMDec 28, 04 AMM7.8
Hover or tap a point to inspect aftershocks and risk probability curve.
<35 km (Shallow)35–70 km (Intermediate)>70 km (Deep)Mainshock

Where it was felt

3 settlements

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

TownDistanceIntensity
Yumen · Gansu108 kmMMI VIII
Jiayuguan · Gansu154 kmMMI VII
Dunhuang · Gansu179 kmMMI VII

Readings by agency

1 sources

Independent solutions for the same rupture. Differences of 0.1–0.3 in magnitude are normal and reflect method and station coverage.

AgencySource IDMagnitudeDepthEpicenter
USGS
Primary
iscgem906530M 7.815 km39.46, 96.56

Tectonic setting

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