Strong mag. 6.2 earthquake - North Pacific Ocean, 57 km west of Liberia, Provincia de Guanacaste, Costa Rica, on Sunday, October 4, 1987 at 08:15 (GMT)
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Strong magnitude 6.2 earthquake at 48 km depth
1 Jan 00:00 UTC: First to report: USGS after 30 seconds.
Depth: 47.9 km
Epicenter latitude / longitude: 10.823°N / 85.926°W (North Pacific Ocean, Costa Rica)
Antipode: 10.823°S / 94.074°E
Nearest volcano: Orosí (52 km / 32 mi)
Nearby towns and cities:
42 km (26 mi) SW of La Cruz (pop: 4,320) --> See nearby quakes!
46 km (28 mi) NW of Sardinal (pop: 3,270) --> See nearby quakes!
57 km (36 mi) WNW of Liberia (pop: 45,400) --> See nearby quakes!
73 km (45 mi) NNW of Santa Cruz (pop: 12,300) --> See nearby quakes!
87 km (54 mi) W of San Jose (Upala) (pop: 31,400) --> See nearby quakes!
91 km (57 mi) NW of Nicoya (pop: 15,300) --> See nearby quakes!
150 km (93 mi) SSE of Managua (Nicaragua) (pop: 973,100) --> See nearby quakes!
152 km (94 mi) NW of Puntarenas (pop: 35,700) --> See nearby quakes!
217 km (135 mi) WNW of San Francisco (pop: 55,900) --> See nearby quakes!
225 km (140 mi) WNW of San Jose (pop: 335,000) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.3 x 1014 joules (35 gigawatt hours, equivalent to 30089 tons of TNT or 1.9 atomic bombs!) | about seismic energy
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.
|6.2||48 km||Costa Rica||USGS|
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Recorded aftershocks, latest first (3 quakes)
|Date and time||Mag|
|Oct 28, 1987 19:16|
34 years ago
|La Cruz, 62 km N of Liberia, Provincia de Guanacaste, Costa Rica||More|
|Oct 26, 1987 05:45|
34 years ago
|North Pacific Ocean, 106 km W of Liberia, Provincia de Guanacaste, Costa Rica||More|
|Oct 4, 1987 19:15|
34 years ago
|North Pacific Ocean, 75 km SW of Liberia, Provincia de Guanacaste, Costa Rica||More|