Strong mag. 6.4 earthquake - North Pacific Ocean, 53 km south of Managua, Nicaragua, on Wednesday, April 8, 1987 at 17:42 (GMT)

Strong mag. 6.4 earthquake - North Pacific Ocean, 53 km south of Managua, Nicaragua, on Wednesday, April 8, 1987 at 17:42 (GMT)

Strong magnitude 6.4 earthquake at 56 km depth

1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Date & time: Apr 8, 1987 17:42:37 UTC
Magnitude: 6.4
Depth: 55.8 km
Epicenter latitude / longitude: 11.678°N / 86.401°W (North Pacific Ocean, Nicaragua)
Antipode: 11.678°S / 93.599°E
Nearest volcano: Masaya (43 km / 27 mi)
Nearby towns and cities:
11 km (7 mi) SSW of El Rosario (pop: 2,990) --> See nearby quakes!
19 km (12 mi) SSE of San Rafael del Sur (pop: 29,800) --> See nearby quakes!
27 km (17 mi) SW of Diriamba (pop: 35,000) --> See nearby quakes!
29 km (18 mi) SW of Jinotepe (pop: 29,500) --> See nearby quakes!
34 km (21 mi) SW of San Marcos (pop: 23,300) --> See nearby quakes!
36 km (22 mi) SSW of El Crucero (pop: 16,500) --> See nearby quakes!
38 km (24 mi) SW of Masatepe (pop: 21,500) --> See nearby quakes!
39 km (24 mi) WSW of Nandaime (pop: 20,800) --> See nearby quakes!
53 km (33 mi) SSW of Managua (pop: 973,100) --> See nearby quakes!
99 km (62 mi) SSE of Leon (pop: 144,500) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2.5 x 1014 joules (69.8 gigawatt hours, equivalent to 60036 tons of TNT or 3.8 atomic bombs!) | about seismic energy
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
Mag.DepthLocationSource
6.456 kmnear the coast of NicaraguaUSGS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.
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Aftershocks

[More info]

Recorded aftershocks, latest first (4 quakes)

Date and timeMag
Depth		LocationDetails
Sep 17, 1987 10:07
34 years ago
4.5

33 km		North Pacific Ocean, 82 km SW of San Rafael del Sur, NicaraguaMore
Sep 3, 1987 04:28
34 years ago
4.4

177 km		Carazo, 44 km SW of Managua, NicaraguaMore
Aug 6, 1987 12:43
35 years ago
4.3

33 km		Departamento de Rivas, 54 km SE of Granada, NicaraguaMore
Apr 27, 1987 11:33
35 years ago
4.8

62 km		North Pacific Ocean, 98 km S of Leon, NicaraguaMore

Earlier earthquakes in the same area

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