Seismic Event Dossier12:21 Local (04:21 UTC)(just now)
23.69°N, 121.95°E
USGS•#iscgem912519reviewed

Earthquake near Off the coast of Hualien, Taiwan

A magnitude 8.2 (MW) earthquake occurred on 1920-06-05, 12:21 local time (04:21 UTC) (just now), centered Off the coast of Hualien (49 km SE, Taiwan). The hypocenter was located at a shallow depth of 20 km. Primary telemetry verified by USGS alongside 1 regional seismic monitoring networks.

Historical Landmark Earthquake

#23 of All Time

Curated Global Seismic Archive (1700–Present)

Top-100 Earthquakes
Magnitude 8.2 historical earthquake occurring on 1920-06-05 in Taiwan. Associated with the Unnamed Fault (Active Fault). Documented casualties: > 1,000.
Documented Fatalities> 1,000
Fault KinematicsActive Fault
Equivalent Energy30.09 Mt TNT

Magnitude

MW
M 8.2

30.09 Mt TNT

Depth

20 km
20 km

shallow (Shallow crustal)

PAGER Impact

red
> 1,000 fatalities

Injuries: > 5,000 · ~71.8M felt

Interactive Epicenter & Fault Map

Fault5 km
Unnamed Fault
Active Fault · ~~15.0 mm/yr
Felt byMMI V+
~71.8M exposed
~43.6M in strong shaking
Primary SolutionUSGS
USGS#iscgem912519reviewed
1 agencies reporting
Geological Setting23.7°N
Taiwan
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%MainshockJun 4, 04 PMJun 5, 04 AMJun 5, 04 PMJun 6, 04 AMJun 6, 04 PMJun 7, 04 AMJun 7, 04 PMJun 8, 04 AMM8.2
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

6 settlements

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

TownDistanceIntensity
Hualien · Hualien49 kmMMI IX
Yilan · Yilan120 kmMMI VIII
Nantou · Nantou132 kmMMI VIII
Taitung · Taitung133 kmMMI VIII
Taichung · Taichung City139 kmMMI VIII
Douliou · Yunlin144 kmMMI VIII

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
iscgem912519M 8.220 km23.69, 121.95

Tectonic setting

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