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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.5 mag strikes near Semisopochnoi Island in Alaska



Earthquake location 52.4502S, 179.7385WA light earthquake with magnitude 4.5 (ml/mb) was reported 56 km N of Semisopochnoi Island, Alaska (35 miles) on Monday. Exact location of earthquake, 179.7385° East, 52.4502° North, depth 145.7 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Global time and date of event 17/01/16 / 2016-01-17 14:40:20 / January 17, 2016 @ 2:40 pm UTC/GMT. The epicenter was at a depth of 145.7 km (91 miles). All ids that are associated to the event: ak12487690, us10004gjh. Unique identifier: us10004gjh. The temblor was detected at 02:40:20 / 2:40 am (local time epicenter).

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

Did you feel anything?

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. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 56 km N of Semisopochnoi Island, Alaska.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude 179.7385° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 52.4502° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 145.7 km Depth of the event in kilometers.
Place 56km N of Semisopochnoi 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 2016-01-17 14:40:20 Time when the event occurred. UTC/GMT
Updated 2016-02-07 20:32:45 Time when the event was most recently updated. UTC/GMT
Timezone offset 720 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 312 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 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 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 us10004gjh Id of event.
Event Code 10004gjh An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak12487690,us10004gjh, A comma-separated list of event ids that are associated to an event.

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