Light earthquake, 4 mag has occurred near Near Islands, Aleutian Islands, Alaska

A light earthquake with magnitude 4 (ml/mb) was reported Near Islands, Aleutian Islands, Alaska (0 miles) on Friday. Exact location of event, depth 8.1 km, 170.6485° East, 53.6573° North. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The temblor was reported at 10:43:33 / 10:43 am (local time epicenter). Date and time of earthquake in UTC/GMT: 21/07/17 / 2017-07-21 10:43:33 / July 21, 2017 @ 10:43 am. Event ids that are associated to the earthquake: ak16357909. Id of event: ak16357909. The earthquake occurred at a depth of 8.1 km (5 miles).

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. Every year there are an estimated 13,000 light earthquakes in the world. In the past 24 hours, there have been thirteen, in the last 10 days thirty-nine, in the past 30 days fourty-one and in the last 365 days fifty-six earthquakes of magnitude 3.0 or greater that was reported nearby.

Questions or comments?

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. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: Near Islands, Aleutian Islands, Alaska. This data comes from the USGS Earthquake Notification Service.

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Parameter	Value	Description
Magnitude	4 mb	The magnitude for the event.
Longitude	170.6485° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	53.6573° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	8.1 km	Depth of the event in kilometers.
Place	Near Islands, Aleutian Islands, Alaska	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2017-07-21 10:43:33	Time when the event occurred. UTC/GMT
Updated	2017-08-09 21:48:00	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	246	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	0.7 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	ak16357909	Id of event.
Event Code	16357909	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,ak16357909,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4 mag has occurred near Near Islands, Aleutian Islands, Alaska

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