M 6.1 earthquake – 15 km WNW of San Antonio, Puerto Rico
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Local time: Oct 11, 1918 · 13:03 (UTC-4)
StrongShallow · 15 km
Reviewed by a seismologist
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- Magnitude
- 6.1moment magnitude (mw)
- Depth
- 15 kmShallow earthquake
- Epicenter
- 18.551, -67.23216 km from Aguadilla
- Energy released
- 21 kilotons of TNTabout 1.4 × Hiroshima
- Felt reports
- —"Did You Feel It?" responses
- Shaking intensity
- —not estimated
- Aftershocks
- 3M2.5+ within 30 km, up to 60 days
- Significance
- 572USGS score, 0–1,000+
Not rare around here
An earthquake at least as strong struck within 300 km on Oct 11, 1918.
How strong was it?
Strong earthquake. It released 21 kilotons of TNT, 45 times the energy of a magnitude 5.0. Bars use the magnitude scale: every step is about 32 times more energy.
Aftershocks
3 earthquakes of M2.5+ within 30 km in the 60 days after.
The strongest earthquakes within 300 km
Since 1900, around Puerto Rico.
- 7.8 16 km NNW of Miches, Dominican Republic Aug 4, 1946
- 7.7 45 km N of San Antonio, Puerto Rico Jul 29, 1943
- 7.1 11 km WNW of Sánchez, Dominican Republic Apr 21, 1948
- 7.1 24 km NNW of San Antonio, Puerto Rico Oct 11, 1918
- 7.0 24 km NNW of Las Terrenas, Dominican Republic Aug 8, 1946
- 6.9 52 km S of San Pedro de Macorís, Dominican Republic Jun 24, 1984
- 6.8 94 km NE of Punta Cana, Dominican Republic Jul 27, 1917
- 6.8 26 km SE of Boca de Yuma, Dominican Republic Apr 24, 1916
In the week before
Earthquakes within 30 km in the 7 days before this one: possible foreshocks.