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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.1 mag strikes near Amukta Island in Alaska



Earthquake location 52.8964S, -171.6144WA light earthquake magnitude 4.1 (ml/mb) has struck on Thursday, 51 km NNW of Amukta Island, Alaska (32 miles). The earthquake was roughly at a depth of 119.9 km (75 miles). Event id: us20003l37. Ids that are associated to the earthquake: ak11711035, us20003l37. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location, longitude -171.6144° West, latitude 52.8964° North, depth = 119.9 km. Date and time of earthquake in UTC/GMT: 18/09/15 / 2015-09-18 03:57:25 / September 18, 2015 @ 3:57 am. The temblor was reported at 16:57:25 / 4:57 pm (local time epicenter).

There are an estimated 13,000 light earthquakes in the world each year. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been two, in the last 10 days two, in the past 30 days seven and in the last 365 days fourty-one earthquakes of magnitude 3.0 or greater that has occurred nearby.

Questions or comments?

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: 51 km NNW of Amukta Island, Alaska. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.1 mb The magnitude for the event.
Longitude -171.6144° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 52.8964° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 119.9 km Depth of the event in kilometers.
Place 51km NNW 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 2015-09-18 03:57:25 Time when the event occurred. UTC/GMT
Updated 2015-10-08 04:46:40 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 ,ak,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 1.671 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.77 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 161 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 us20003l37 Id of event.
Event Code 20003l37 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak11711035,us20003l37, A comma-separated list of event ids that are associated to an event.

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