Taiwan earthquakes

M4.9 earthquake 37 km SSE of Yilan, Taiwan

A magnitude 4.9 earthquake struck 37 km SSE of Yilan, Taiwan on Mon, Jul 31, 1978, 8:20 AM GMT+8 (00:20 UTC), 27 km (17 mi) below the surface.

A larger quake followed: M6.1 27 km SSE of Jiufen, Taiwan. This one was a foreshock.

Yilan forecastMore in Taiwan

Map

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

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The earthquake

Magnitude
4.9 (ms), light
Local time
UTC
1978-07-31 00:20:42 UTC
Depth
27.0 km (16.8 mi), shallow
Epicenter
24.437° N, 121.862° E
Region
Taiwan
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Stations used
96

Nearest places

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

Nearby

Within 100 km, magnitude 1.9 and up: 15 in the 60 days after this one and 1 in the 30 days before it.

After

  1. 4.012 km ESE of Puli, Taiwan · 17578 days ago · 10 km deep · 97 km away
  2. 4.238 km S of Yilan, Taiwan · 17571 days ago · 17 km deep · 13 km away
  3. 4.842 km S of Hualien City, Taiwan · 17562 days ago · 48 km deep · 96 km away
  4. 6.127 km SSE of Jiufen, Taiwan · 17552 days ago · 109 km deep · 53 km away
  5. 5.118 km NNE of Hualien City, Taiwan · 17550 days ago · 4 km deep · 39 km away
  6. 5.38 km ESE of Hualien City, Taiwan · 17549 days ago · 17 km deep · 57 km away
  7. 4.225 km E of Hualien City, Taiwan · 17549 days ago · 9 km deep · 55 km away
  8. 4.738 km ENE of Hualien City, Taiwan · 17548 days ago · 8 km deep · 41 km away
  9. 5.030 km ENE of Hualien City, Taiwan · 17546 days ago · 19 km deep · 36 km away
  10. 5.128 km NE of Hualien City, Taiwan · 17544 days ago · 21 km deep · 30 km away
  11. 5.033 km ENE of Hualien City, Taiwan · 17544 days ago · 17 km deep · 33 km away
  12. 5.021 km NE of Hualien City, Taiwan · 17544 days ago · 21 km deep · 36 km away
  13. 5.419 km NNE of Hualien City, Taiwan · 17544 days ago · 15 km deep · 38 km away
  14. 5.223 km NE of Hualien City, Taiwan · 17543 days ago · 19 km deep · 37 km away
  15. 4.417 km ENE of Hualien City, Taiwan · 17541 days ago · 17 km deep · 44 km away

Before

  1. 3.98 km SSW of Hualien City, Taiwan · 17610 days ago · 36 km deep · 66 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0000vv9 (also filed as iscgem680203). Read Tue, Sep 22, 2026, 11:19 AM UTC.