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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4 mag strikes near Nikolski in Alaska

Posted by admin on March 23, 2017 0 Comments

Earthquake location 52.4888S, -169.6488WA light earthquake with magnitude 4 (ml/mb) was detected on Monday, 72 km SW of Nikolski, Alaska (45 miles). Exact location of event, depth 49.92 km, -169.6488° West, 52.4888° North. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Date and time of earthquake in UTC/GMT: 21/02/17 / 2017-02-21 04:09:00 / February 21, 2017 @ 4:09 am. Unique identifier: us20008mpy. Ids that are associated to the event: ak15419621, us20008mpy. The earthquake was roughly at a depth of 49.92 km (31 miles). The temblor was picked up at 17:09:00 / 5:09 pm (local time epicenter).

Each year there are an estimated 13,000 light quakes in the world. In the past 24 hours, there have been nineteen, in the last 10 days twenty-one, in the past 30 days twenty-three and in the last 365 days one hundred and eighty-four 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.

Did you feel it?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 72 km SW of Nikolski, Alaska.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -169.6488° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 52.4888° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 49.92 km Depth of the event in kilometers.
Place 72km SW of Nikolski, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-02-21 04:09:00 Time when the event occurred. UTC/GMT
Updated 2017-03-22 23:56:59 Time when the event was most recently updated. UTC/GMT
Timezone offset -660 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 0.367 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.97 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 176 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 us20008mpy Id of event.
Event Code 20008mpy An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak15419621,us20008mpy, A comma-separated list of event ids that are associated to an event.

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