M 7.7 earthquake – 50 km SSE of Yilan, Taiwan
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Local time: Sep 2, 1922 · 03:16 (UTC+8)
MajorShallow · 20 km
Reviewed by a seismologist
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- Magnitude
- 7.7moment magnitude (mw)
- Depth
- 20 kmShallow earthquake
- Epicenter
- 24.364, 122.00047 km from Xiulin
- Energy released
- 5.4 megatons of TNTabout 357 × Hiroshima
- Felt reports
- —"Did You Feel It?" responses
- Shaking intensity
- 6.8max. instrumental (MMI)
- Aftershocks
- 8M2.5+ within 190 km, up to 60 days
- Significance
- 910USGS score, 0–1,000+
The strongest here since 1920
The last earthquake at least as strong within 300 km struck on Jun 5, 1920.
How strong was it?
Major earthquake. It released 5.4 megatons of TNT, 11,220 times the energy of a magnitude 5.0. Bars use the magnitude scale: every step is about 32 times more energy.
Aftershocks
8 earthquakes of M2.5+ within 190 km in the 60 days after.
- 6.3 71 km S of Yonakuni, Japan Sep 6, 1922
- 7.0 39 km WSW of Yonakuni, Japan Sep 14, 1922
- 6.8 56 km W of Yonakuni, Japan Sep 16, 1922
- 6.5 26 km SW of Yilan, Taiwan Sep 17, 1922
- 6.7 34 km SSW of Yilan, Taiwan Sep 17, 1922
- 6.1 23 km W of Taoyuan City, Taiwan Oct 14, 1922
- 7.0 30 km S of Daxi, Taiwan Oct 14, 1922
- 6.7 6 km WSW of Hualien City, Taiwan Oct 27, 1922
The strongest earthquakes within 300 km
Since 1900, around Taiwan.
- 8.2 1920 Hualien, Taiwan Earthquake Jun 5, 1920
- 8.1 1910 Taiwan Earthquake Apr 12, 1910
- 7.8 Taiwan Nov 24, 1951
- 7.7 21 km S of Puli, Taiwan Sep 20, 1999
- 7.5 38 km SW of Yonakuni, Japan Mar 12, 1966
- 7.5 58 km SSW of Hualien City, Taiwan Oct 21, 1951
- 7.4 15 km S of Hualien City, Taiwan Apr 2, 2024
- 7.4 8 km SSW of Hualien City, Taiwan Nov 14, 1986