M 7.4 earthquake – 19 km S of Valparaíso, Chile
·
Local time: Mar 3, 1985 · 21:32 (UTC-3)
MajorShallow · 33 km
Reviewed by a seismologist
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- Magnitude
- 7.4moment magnitude (mw)
- Depth
- 33 kmShallow earthquake
- Epicenter
- -33.207, -71.66319 km from Valparaíso
- Energy released
- 1.9 megatons of TNTabout 127 × Hiroshima
- Felt reports
- —"Did You Feel It?" responses
- Shaking intensity
- 7.2max. instrumental (MMI)
- Aftershocks
- 102M2.5+ within 127 km, up to 60 days
- Significance
- 842USGS score, 0–1,000+
Not rare around here
An earthquake at least as strong struck within 300 km on Mar 3, 1985.
How strong was it?
Major earthquake. It released 1.9 megatons of TNT, 3,981 times the energy of a magnitude 5.0. Bars use the magnitude scale: every step is about 32 times more energy.
Aftershocks
102 earthquakes of M2.5+ within 127 km in the 60 days after.
- 5.3 29 km W of San Antonio, Chile Mar 4, 1985
- 5.2 45 km WNW of Cartagena, Chile Mar 4, 1985
- 5.3 65 km WSW of Valparaíso, Chile Mar 4, 1985
- 5.1 45 km WSW of Valparaíso, Chile Mar 4, 1985
- 5.4 40 km WSW of Valparaíso, Chile Mar 4, 1985
- 5.2 41 km WSW of Valparaíso, Chile Mar 4, 1985
- 4.9 54 km SSW of San Antonio, Chile Mar 4, 1985
- 5.2 43 km WSW of Valparaíso, Chile Mar 4, 1985
- 5.1 79 km WNW of Santa Cruz, Chile Mar 4, 1985
- 6.2 63 km SSW of San Antonio, Chile Mar 4, 1985
The strongest earthquakes within 300 km
Since 1900, around Chile.
- 8.3 48 km W of Illapel, Chile Sep 16, 2015
- 8.2 The 1906 Valparaiso, Chile Earthquake Aug 17, 1906
- 8.1 45 km NNW of Illapel, Chile Apr 6, 1943
- 8.0 25 km WSW of Valparaíso, Chile Mar 3, 1985
- 7.8 19 km NNE of Hacienda La Calera, Chile Jul 9, 1971
- 7.7 30 km NNE of Constitución, Chile Dec 1, 1928
- 7.7 103 km NW of Constitución, Chile Jan 30, 1914
- 7.4 7 km SSE of La Ligua, Chile Mar 28, 1965
In the week before
Earthquakes within 127 km in the 7 days before this one: possible foreshocks.
- 4.5 21 km S of Valparaíso, Chile Feb 27, 1985
- 4.5 18 km S of Valparaíso, Chile Feb 27, 1985
- 5.5 12 km SW of Valparaíso, Chile Mar 3, 1985
- 8.0 25 km WSW of Valparaíso, Chile Mar 3, 1985
- 6.4 5 km N of Hacienda La Calera, Chile Mar 3, 1985
- 5.9 12 km NE of Viña del Mar, Chile Mar 4, 1985
- 5.5 11 km S of Valparaíso, Chile Mar 4, 1985