Light earthquake, 4.1 mag strikes near Amukta Island in Alaska

A light earthquake with magnitude 4.1 (ml/mb) was reported 108 km SSW of Amukta Island, Alaska (67 miles) on Friday. Event ids that are associated to the earthquake: us10002wwk. Id of event: us10002wwk. The temblor was picked up at 05:26:18 / 5:26 am (local time epicenter). Date and time of earthquake in UTC/GMT: 31/07/15 / 2015-07-31 16:26:18 / July 31, 2015 @ 4:26 pm. The earthquake was roughly at a depth of 37.36 km (23 miles). Exact location of event, depth 37.36 km, -171.6952° West, 51.5509° North. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

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 one, in the last 10 days four, in the past 30 days twelve and in the last 365 days fifty-nine earthquakes of magnitude 3.0 or greater that has struck near.

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What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 108 km SSW of Amukta Island, Alaska.

Alaska Amukta Island

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Parameter	Value	Description
Magnitude	4.1 mb	The magnitude for the event.
Longitude	-171.6952° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	51.5509° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	37.36 km	Depth of the event in kilometers.
Place	108km SSW of Amukta 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	2015-07-31 16:26:18	Time when the event occurred. UTC/GMT
Updated	2015-07-31 17:05:48	Time when the event was most recently updated. UTC/GMT
Timezone offset	-660	Timezone offset from UTC in minutes at the event epicenter.
Felt	0	The total number of felt reports
CDI	1	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	259	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	1.682	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	1.25 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	142	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	us10002wwk	Id of event.
Event Code	10002wwk	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us10002wwk,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4.1 mag strikes near Amukta Island in Alaska

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