Moderate mag. 4.7 earthquake - Gulf of Alaska, 81 mi south of Kodiak, Alaska, USA, on Wednesday, 12 April 1978 at 04:26 (GMT)

Moderate mag. 4.7 earthquake - Gulf of Alaska, 81 mi south of Kodiak, Alaska, USA, on Wednesday, 12 April 1978 at 04:26 (GMT)

Moderate magnitude 4.7 earthquake at 16 km depth

Date & time: 12 Apr 1978 04:26:56 UTC
Magnitude: 4.7
Depth: 16.0 km
Epicenter latitude / longitude: 56.627°N / 152.63°W (Gulf of Alaska, Alaska, United States)
Nearest volcano: Unnamed 57.87°N/155.42°W (217 km / 135 mi)
Nearby towns and cities:
76 km (47 mi) SSE of Old Harbor (pop: 221) --> See nearby quakes!
100 km (62 mi) ESE of Akhiok (pop: 72) --> See nearby quakes!
117 km (73 mi) S of Womens Bay (pop: 719) --> See nearby quakes!
127 km (79 mi) S of Kodiak Station (pop: 1,300) --> See nearby quakes!
130 km (81 mi) S of Kodiak (pop: 6,250) --> See nearby quakes!
139 km (86 mi) S of Port Lions (pop: 197) --> See nearby quakes!
341 km (212 mi) S of Homer (pop: 5,520) --> See nearby quakes!
353 km (220 mi) S of Anchor Point (pop: 1,930) --> See nearby quakes!
355 km (220 mi) SSW of Fritz Creek (pop: 1,930) --> See nearby quakes!
429 km (267 mi) SSW of Seward (pop: 2,790) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 7.1 x 1011 joules (197 megawatt hours, equivalent to 169 tons of TNT) 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
4.716 kmKodiak Island region, Alaska (USA)USGS
Note: for quakes of 2012 and earlier, our database often contains only records from USGS.

User reports for this quake

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