Minor earthquake: M3.9 quake has struck near Shemya Island in Alaska

A minor earthquake with magnitude 3.9 (ml/mb) was detected on Saturday, 187 km S of Shemya Island, Alaska (116 miles). Exact time and date of event in UTC/GMT: 21/03/20 / 2020-03-21 04:40:09 / March 21, 2020 @ 4:40 am. Event ids that are associated to the earthquake: us70008h0u. Id of event: us70008h0u. Exact location, longitude 173.9416° East, latitude 51.0453° North, depth = 10 km. The epicenter of the earthquake was roughly 10 km (6 miles) below the earth’s surface. The temblor was picked up at 16:40:09 / 4:40 pm (local time epicenter).

Each year there are an estimated 130,000 minor quakes in the world. In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days one and in the last 365 days six earthquakes of magnitude 3.0 or greater that have been detected in the same area. Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage.

Did you feel the quake?

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, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 187 km S of Shemya Island, Alaska. This information comes from the USGS Earthquake Notification Service.

Alaska Shemya Island

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Parameter	Value	Description
Magnitude	3.9 mb	The magnitude for the event.
Longitude	173.9416° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	51.0453° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	10 km	Depth of the event in kilometers.
Place	187km S of Shemya Island, Alaska	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2020-03-21 04:40:09	Time when the event occurred. UTC/GMT
Updated	2020-04-01 04:15:05	Time when the event was most recently updated. UTC/GMT
Timezone offset	720	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	234	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	1.689	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	1.52 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	206	The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type	mb	The method or algorithm used to calculate the preferred magnitude for the event.
Event Type	earthquake	Type of seismic event.
Event ID	us70008h0u	Id of event.
Event Code	70008h0u	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us70008h0u,	A comma-separated list of event ids that are associated to an event.

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Minor earthquake: M3.9 quake has struck near Shemya Island in Alaska

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