Very strong mag. 6.4 earthquake - North Pacific Ocean, 104 mi west of Eureka, Humboldt County, California, USA, on Thursday, 11 October 1956 at 16:48 (GMT)
Quake Data | Interactive map | User Reports | Aftershocks | Earlier quakes in same area | Quakes in the US| California | California | Oregon
Very strong magnitude 6.4 earthquake at 10 km depth
Date & time: 11 Oct 1956 16:48:51 UTC
Depth: 10.0 km
Epicenter latitude / longitude: 40.422°N / 126.09°W (North Pacific Ocean, California, United States)
Nearest volcano: Escanaba Segment (134 km / 83 mi)
Nearby towns and cities:
155 km (97 mi) W of Ferndale (pop: 1,370) --> See nearby quakes!
168 km (104 mi) WSW of Eureka (Humboldt County) (pop: 27,000) --> See nearby quakes!
176 km (110 mi) WSW of Arcata (Humboldt County) (pop: 17,800) --> See nearby quakes!
177 km (110 mi) WSW of Bayside (Humboldt County) (pop: 17,100) --> See nearby quakes!
178 km (110 mi) WSW of McKinleyville (Humboldt County) (pop: 15,200) --> See nearby quakes!
284 km (177 mi) WNW of Ukiah (pop: 15,900) --> See nearby quakes!
321 km (200 mi) SW of Grants Pass (Josephine County, Oregon) (pop: 37,100) --> See nearby quakes!
342 km (212 mi) SW of Medford (Oregon) (pop: 79,800) --> See nearby quakes!
364 km (226 mi) NW of Santa Rosa (pop: 175,000) --> See nearby quakes!
384 km (239 mi) NW of Petaluma (pop: 60,400) --> 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
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.
|6.4||10 km||off the coast of Northern California (USA)||USGS|
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
be the first to report it!There are no user reports for this quake yet. If you felt it
More infoRecorded aftershocks, latest first (2 quakes):
- 11 Oct 1956 17:22 UTC| M 4.8 |0 km (0 mi) depth|39 km (25 mi) distance| USGS | Details
- 11 Oct 1956 17:18 UTC| M 4.8 |0 km (0 mi) depth|44 km (27 mi) distance| USGS | Details