Very strong mag. 6.4 earthquake - North Pacific Ocean, 28 km southwest of Isla Cabo Blanco Island, Costa Rica, on Friday, 21 July 2000 at 01:53 (GMT)

Very strong mag. 6.4 earthquake - North Pacific Ocean, 28 km southwest of Isla Cabo Blanco Island, Costa Rica, on Friday, 21 July 2000 at 01:53 (GMT)

Very strong magnitude 6.4 earthquake at 33 km depth

Date & time: 21 Jul 2000 01:53:35 UTC
Magnitude: 6.4
Depth: 33.0 km
Epicenter latitude / longitude: 9.416°N / 85.329°W (North Pacific Ocean, Costa Rica)
Nearest volcano: Cerro San Miguel (96 km / 60 mi)
Nearby towns and cities:
56 km (35 mi) SSE of Samara (pop: 1,070) --> See nearby quakes!
82 km (51 mi) SW of Puntarenas (pop: 35,700) --> See nearby quakes!
83 km (51 mi) S of Nicoya (pop: 15,300) --> See nearby quakes!
87 km (54 mi) SW of Chacarita (pop: 26,400) --> See nearby quakes!
97 km (60 mi) SW of Esparza (Espíritu Santo) (pop: 15,600) --> See nearby quakes!
136 km (85 mi) S of Liberia (pop: 45,400) --> See nearby quakes!
140 km (87 mi) WSW of Alajuela (pop: 47,500) --> See nearby quakes!
146 km (91 mi) WSW of San Francisco (pop: 55,900) --> See nearby quakes!
148 km (92 mi) WSW of San Jose (pop: 335,000) --> See nearby quakes!
259 km (161 mi) WSW of Puerto Limon (pop: 63,100) --> 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!) More info
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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.
MagnitudeDepthLocationSource
M 6.433 kmoff the coast of Costa RicaUSGS
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 yet. If you felt it be the first to report it!
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Aftershocks

More info
Recorded aftershocks, latest first (4 quakes):
  • 20 Dec 2000 15:17 UTC
    | M 5.5 |
    33 km (20.5 mi) depth
    |
    13 km (8 mi) distance
    | USGS | Details
  • 24 Jul 2000 13:38 UTC
    | M 5.2 |
    33 km (20.5 mi) depth
    |
    15 km (10 mi) distance
    | USGS | Details
  • 21 Jul 2000 07:38 UTC
    | M 5.0 |
    33 km (20.5 mi) depth
    |
    12 km (8 mi) distance
    | USGS | Details
  • 21 Jul 2000 05:46 UTC
    | M 5.5 |
    33 km (20.5 mi) depth
    |
    22 km (14 mi) distance
    | USGS | Details

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Earlier earthquakes in the same area

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