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Minor earthquake: M3.1 quake has struck near Nanwalek in Alaska

Earthquake location 59.3818S, -151.9911WA minor earthquake with magnitude 3.1 (ml/mb) was reported 4 kilometers (2 miles) from Nanwalek in Alaska on Friday. The temblor was reported at 15:45:08 / 3:45 pm (local time epicenter). The earthquake occurred at a depth of 49.34 km (31 miles). Event id: us6000b7gz. Ids that are associated to the earthquake: us6000b7gz. Exact location, longitude -151.9911° West, latitude 59.3818° North, depth = 49.34 km. Global time and date of event 31/07/20 / 2020-07-31 15:45:08 / July 31, 2020 @ 3:45 pm UTC/GMT.

Closest city/cities/towns to epicentrum/hypocenter was Homer (min 5000 pop). Country/countries that might be effected, United States (c. 310 233 000 pop). Event epicenter was 38 km (24 miles) from Homer (c. 5 000 pop).

In the past 24 hours, there have been one, in the last 10 days three, in the past 30 days five and in the last 365 days fifty-six earthquakes of magnitude 3.0 or greater that was reported nearby. Earthquakes 2.5 to 3.5 are often felt, but only causes minor damage. Every year there are an estimated 130,000 minor earthquakes in the world.

Questions or comments?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 4 km NW of Nanwalek, Alaska. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 3.1 mb The magnitude for the event.
Longitude -151.9911° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 59.3818° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 49.34 km Depth of the event in kilometers.
Place 4 km NW of Nanwalek, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2020-07-31 15:45:08 Time when the event occurred. UTC/GMT
Updated 2020-07-31 15:52:58 Time when the event was most recently updated. UTC/GMT
Timezone offset Timezone offset from UTC in minutes at the event epicenter.
Felt The total number of felt reports
CDI The maximum reported intensity for the event.
MMI The maximum estimated instrumental intensity for the event.
Alert Level The alert level from the PAGER earthquake impact scale. Green, Yellow, Orange or Red.
Review Status reviewed Indicates whether the event has been reviewed by a human.
Tsunami 0 This flag is set to "1" for large events in oceanic regions and "0" otherwise. The existence or value of this flag does not indicate if a tsunami actually did or will exist.
SIG 148 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network us The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,us, A comma-separated list of network contributors.
Number of Stations Used The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.326 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.47 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 122 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type ml The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID us6000b7gz Id of event.
Event Code 6000b7gz An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000b7gz, A comma-separated list of event ids that are associated to an event.

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