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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4 mag, 101 km S of Adak, Alaska



Earthquake location 50.9844S, -176.3757WA light earthquake magnitude 4 (ml/mb) has occurred on Tuesday, 101 km S of Adak, Alaska (63 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of earthquake, -176.3757° West, 50.9844° North, depth 10 km. Date and time of earthquake in UTC/GMT: 04/04/17 / 2017-04-04 22:46:14 / April 4, 2017 @ 10:46 pm. Unique identifier: us10008efn. Ids that are associated to the event: ak15685260, us10008efn. The epicenter of the earthquake was roughly 10 km (6 miles) below the earth’s surface. The temblor was picked up at 10:46:14 / 10:46 am (local time epicenter).

In the past 24 hours, there have been thirty-eight, in the last 10 days thirty-eight, in the past 30 days fourty-two and in the last 365 days one hundred and thirty-five earthquakes of magnitude 3.0 or greater that have been detected in the same area. 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.

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: 101 km S of Adak, Alaska. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -176.3757° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 50.9844° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 101km S of Adak, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-04-04 22:46:14 Time when the event occurred. UTC/GMT
Updated 2017-04-21 22:21:12 Time when the event was most recently updated. UTC/GMT
Timezone offset -720 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 246 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 0.919 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.94 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 231 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 us10008efn Id of event.
Event Code 10008efn An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak15685260,us10008efn, A comma-separated list of event ids that are associated to an event.

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