Moderate earthquake, 5 mag strikes near Chignik Lake in Alaska

A moderate earthquake with magnitude 5 (ml/mb) was detected on Thursday, 78 km S of Chignik Lake, Alaska (48 miles). The epicenter was at a depth of 3 km (2 miles). The 5-magnitude earthquake has occurred at 18:31:14 / 6:31 pm (local time epicenter). Exact location of event, longitude -158.855 West, latitude 55.548 North, depth = 3 km. A tsunami warning has been issued near Chignik Lake in Alaska (Does not indicate if a tsunami actually did or will exist). Date and time of earthquake in UTC/GMT: 23/02/18 / 2018-02-23 03:31:14 / February 23, 2018 @ 3:31 am. Unique identifier: at00p4l342. Ids that are associated to the event: at00p4l342.

In the past 24 hours, there have been three, in the last 10 days three, in the past 30 days seven and in the last 365 days fourty-six earthquakes of magnitude 3.0 or greater that has occurred nearby. Earthquakes 5.0 to 6.0 may cause light damage to buildings and other structures. Each year there are an estimated 1320 moderate earthquakes in the world.

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Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home and country. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 78 km S of Chignik Lake, Alaska. This data comes from the USGS Earthquake Notification Service.

Alaska Chignik Lake

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Parameter	Value	Description
Magnitude	5 mb	The magnitude for the event.
Longitude	-158.855° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	55.548° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	3 km	Depth of the event in kilometers.
Place	78km S of Chignik Lake, Alaska	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2018-02-23 03:31:14	Time when the event occurred. UTC/GMT
Updated	2018-02-23 03:34:57	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	1	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	385	A number describing how significant the event is. Larger numbers indicate a more significant event.
Network	at	The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources	,at,	A comma-separated list of network contributors.
Number of Stations Used	42	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.7941107	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	190.799984736	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	at00p4l342	Id of event.
Event Code	00p4l342	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,at00p4l342,	A comma-separated list of event ids that are associated to an event.

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Moderate earthquake, 5 mag strikes near Chignik Lake in Alaska

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