Strong mag. 6.3 earthquake - Alamagan Region, Northern Mariana Islands, on Saturday, 23 December 1989 at 11:24 (GMT)

Strong mag. 6.3 earthquake  - Alamagan Region, Northern Mariana Islands, on Saturday, 23 December 1989 at 11:24 (GMT)

Strong magnitude 6.3 earthquake at 162 km depth

Date & time: 23 Dec 1989 11:24:02 UTC###AGESTRINGCOPY###
Magnitude: 6.3
Depth: 161.5 km
Epicenter latitude / longitude: 17.401°N / 145.788°E (Northern Mariana Islands)
Nearest volcano: Guguan (12 km / 7 mi)
Nearby towns and cities:
81 km (50 mi) S of Pagan Village (Pagan Island) (pop: 50)
243 km (151 mi) N of Saipan (pop: 48,200)
271 km (169 mi) N of San Jose (pop: 15,000)
444 km (276 mi) NNE of Dededo Village (Guam) (pop: 44,900)
453 km (282 mi) NNE of Chalan Pago-Ordot Village (Guam) (pop: 6,820)
462 km (287 mi) NNE of Santa Rita Village (Guam) (pop: 7,500)
472 km (294 mi) NNE of Inarajan Village (Guam) (pop: 3,050)
Primary data source: USGS
Estimated released energy: 1.8 x 1014 joules (49.4 gigawatt hours, equivalent to 42502 tons of TNT or 2.7 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 6.3162 kmAlamagan region, Northern Mariana IslandsUSGS
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.
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Aftershocks of the 6.3 quake Alamagan Region, Northern Mariana Islands, 23 December 11:24 UTC

More info
Recorded aftershocks, latest first (1 quakes):
  • 25 Apr 1990 02:07 UTC
    | M 4.7 |
    137.4 km (85.4 mi) depth
    |
    66 km (41 mi) distance
    | USGS | Details

Earlier earthquakes in the same area since 1900

Strong mag. 6.3 earthquake - Alamagan Region, Northern Mariana Islands, on Saturday, 23 December 1989 at 11:24 (GMT)

Map of earlier quakes

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