Taiwan earthquakes

M6.1 earthquake 31 km SE of Puli, Taiwan

A magnitude 6.1 earthquake struck 31 km SE of Puli, Taiwan on Tue, Sep 21, 1999, 1:57 AM GMT+8 (17:57 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M6.5 31 km SE of Puli, Taiwan. This one was a foreshock.

Puli forecast More in Taiwan

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 6.1 (mb), strong
Local time: Tue, Sep 21, 1999, 1:57 AM GMT+8
UTC: 1999-09-20 17:57:16 UTC
Depth: 33.0 km (20.5 mi), shallow
Epicenter: 23.785° N, 121.202° E
Region: Taiwan
Strongest shaking: V, moderate shaking
Tsunami flag: No
Status: Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated: V, moderate shaking
Peak ground acceleration: 10.9% of gravity
Peak ground velocity: 2.1 cm/s
Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Depth from: OPERATOR_ASSIGNED

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 3.1 and up: 182 in the 60 days after this one and 1 in the 30 days before it.

After

The first 60 of 182.

Before

7.721 km S of Puli, TaiwanTue, Sep 21, 1:47 AM GMT+8 · 9871 days ago · 33 km deep · 22 km away

Earthquakes today Taiwan earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0009eq2 (also filed as atlas19990920175719, iscgem1656084). Read Tue, Sep 29, 2026, 4:35 PM UTC.