Strong mag. 5.6 earthquake - Gulf of Alaska, 65 mi south of Sand Point, Aleutians East County, Alaska, USA, on 2018-07-18 08:06:03 -11:00

This quake was likely a foreshock of the 6.0 quake - 92km WSW of Chernabura Island, Alaska, 2018-07-19 03:16:26 -11:00, which followed after 19 hours.
Strong mag. 5.6 earthquake - Gulf of Alaska, 65 mi south of Sand Point, Aleutians East County, Alaska, USA, on 2018-07-18 08:06:03 -11:00

Strong magnitude 5.6 earthquake at 28 km depth

18 Jul 19:14 UTC: First to report: USGS after 8 minutes.
Jul 18 19:20: Magnitude recalculated from 5.5 to 5.7.
Hypocenter depth recalculated from 10.0 to 13.0 km.
Jul 18 20:12: Magnitude recalculated from 5.7 to 5.6.
Hypocenter depth recalculated from 13.0 to 28.0 km.
Date & time: 18 Jul 2018 19:06:03 UTC
Local time at epicenter: 2018-07-18 08:06:03 -11:00
Magnitude: 5.6
Depth: 28.0 km
Epicenter latitude / longitude: 54.4006°N / 160.7164°W (Gulf of Alaska, Alaska, United States)
Nearest volcano: Dutton (124 km / 77 mi)
Nearby towns and cities:
105 km (65 mi) S of Sand Point (pop: 1,060) --> See nearby quakes!
126 km (79 mi) SE of King Cove (pop: 1,010) --> See nearby quakes!
155 km (97 mi) ESE of Cold Bay (pop: 123) --> See nearby quakes!
181 km (112 mi) S of Nelson Lagoon (pop: 52) --> See nearby quakes!
181 km (112 mi) ESE of False Pass (pop: 40) --> See nearby quakes!
195 km (121 mi) SSW of Perryville (pop: 113) --> See nearby quakes!
241 km (149 mi) SSW of Chignik Lake (pop: 73) --> See nearby quakes!
330 km (205 mi) E of Akutan (pop: 1,040) --> See nearby quakes!
383 km (238 mi) ENE of Unalaska (pop: 4,490) --> See nearby quakes!
384 km (238 mi) E of Dutch Harbor (pop: 4,380) --> See nearby quakes!
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.6 x 1013 joules (4.4 gigawatt hours, equivalent to 3788 tons of TNT or 0.2 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 5.628 km- 86km WSW of Chernabura Island, AlaskaUSGS
M 5.510 kmAlaska PeninsulaGFZ
M 5.713 kmALASKA PENINSULAEMSC
M 5.541 kmAlaska PeninsulaGeoAu

shake map
(shakemap: USGS)

User reports for this quake (3)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Cold Bay, Alaska / Moderate shaking (MMI V) : In the beginning of the earthquake I though it was heavy equipment driving by until it got stronger.
Cold Bay, Alaska / Moderate shaking (MMI V) : In the beginning of the earthquake I though it was heavy equipment driving by until it got stronger.
Port Moller (176.6 km N of epicenter) [Map] / Light shaking (MMI IV) : 1 jolt 5 seconds long (reported through our app)
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Earlier earthquakes in the same area

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