Taiwan earthquakes

M5.8 earthquake 39 km SSE of Puli, Taiwan

A magnitude 5.8 earthquake struck 39 km SSE of Puli, Taiwan on Wed, Sep 22, 1999, 8:49 AM GMT+8 (00:49 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: 5.8 (mwc), moderate
Local time: Wed, Sep 22, 1999, 8:49 AM GMT+8
UTC: 1999-09-22 00:49:42 UTC
Depth: 33.0 km (20.5 mi), shallow
Epicenter: 23.642° N, 121.136° 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: 8.6% of gravity
Peak ground velocity: 1.6 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.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting: Reverse (thrust)
Nodal plane 1: Strike 3°, dip 25°, rake 97°
Nodal plane 2: Strike 175°, dip 65°, rake 87°

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 2.8 and up: 111 in the 60 days after this one and 74 in the 30 days before it.

After

The first 60 of 111.

Before

Earthquakes today Taiwan earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0009eup (also filed as gcmtc092299b, gcmt19990922004942, atlas19990922004943, iscgem1656276). Read Tue, Sep 29, 2026, 4:35 PM UTC.