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Minor earthquake: M2.8 quake has struck near Larsen Bay in Alaska

Earthquake location 56.4471S, -153.5339WA minor earthquake with magnitude 2.8 (ml/mb) was detected on Thursday, 124 km SSE of Larsen Bay, Alaska (77 miles). Global date and time of event UTC/GMT: 21/09/17 / 2017-09-21 19:28:08 / September 21, 2017 @ 7:28 pm. The 2.8-magnitude earthquake was detected at 10:28:08 / 10:28 am (local time epicenter). Exact location of event, longitude -153.5339 West, latitude 56.4471 North, depth = 34.4 km. All ids that are associated to the event: ak16875508. Unique identifier: ak16875508. The epicenter was at a depth of 34.4 km (21 miles).

Earthquakes 2.5 to 2.9 are often felt, but only causes minor damage. Every year there are an estimated 1,300,000 minor earthquakes in the world. In the past 24 hours, there have been 0, in the last 10 days one, in the past 30 days two and in the last 365 days twenty earthquakes of magnitude 3.0 or greater that has struck near.

How would you describe the shaking?

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, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 124 km SSE of Larsen Bay, Alaska. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 2.8 mb The magnitude for the event.
Longitude -153.5339° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 56.4471° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 34.4 km Depth of the event in kilometers.
Place 124km SSE of Larsen Bay, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-09-21 19:28:08 Time when the event occurred. UTC/GMT
Updated 2017-09-26 17:51:23 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 121 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 0.52 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 ak16875508 Id of event.
Event Code 16875508 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak16875508, A comma-separated list of event ids that are associated to an event.

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