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Minor World Earthquakes Magnitude -3.9

Minor earthquake: M3.7 quake has struck near Unalaska in Alaska

Earthquake location 53.6857S, -166.4652WA minor earthquake magnitude 3.7 (ml/mb) has occurred on Wednesday, 21 km SSE of Unalaska, Alaska (13 miles). The temblor was reported at 23:12:37 / 11:12 pm (local time epicenter). Date and time of earthquake in UTC/GMT: 16/04/20 / 2020-04-16 08:12:37 / April 16, 2020 @ 8:12 am. The earthquake was roughly at a depth of 75 km (47 miles). All ids that are associated to the event: ak0204x3c97k. Unique identifier: ak0204x3c97k. Exact location of earthquake, longitude -166.4652 West, latitude 53.6857 North, depth = 75 km.

Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage. In the past 24 hours, there have been four, in the last 10 days seven, in the past 30 days nine and in the last 365 days one hundred earthquakes of magnitude 3.0 or greater that was reported nearby. There are an estimated 130,000 minor earthquakes in the world each year.

Did you feel it?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage at your home, city and country. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 21 km SSE of Unalaska, Alaska.

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More information

Parameter Value Description
Magnitude 3.7 mb The magnitude for the event.
Longitude -166.4652° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 53.6857° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 75 km Depth of the event in kilometers.
Place 21km SSE of Unalaska, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2020-04-16 08:12:37 Time when the event occurred. UTC/GMT
Updated 2020-05-07 03:32:52 Time when the event was most recently updated. UTC/GMT
Timezone offset -540 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 211 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network ak The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,ak, 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 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.54 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 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 ak0204x3c97k Id of event.
Event Code 0204x3c97k An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak0204x3c97k, A comma-separated list of event ids that are associated to an event.

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