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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.2 mag, 52 km SW of Attu Station, Alaska



Earthquake location 52.5456S, 172.5903WA light earthquake with magnitude 4.2 (ml/mb) was detected on Friday, 52 km SW of Attu Station, Alaska (32 miles). Id of earthquake: us20008k7e. Event ids that are associated: us20008k7e. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of event, longitude 172.5903 East, latitude 52.5456 North, depth = 35.78 km. The epicenter of the earthquake was roughly 35.78 km (22 miles) below the earth’s surface. Global date and time of event UTC/GMT: 02/02/17 / 2017-02-02 18:33:49 / February 2, 2017 @ 6:33 pm. The 4.2-magnitude earthquake was detected at 06:33:49 / 6:33 am (local time epicenter).

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

Did you feel the quake?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking and damage at your home, city 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: 52 km SW of Attu Station, Alaska.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude 172.5903° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 52.5456° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 35.78 km Depth of the event in kilometers.
Place 52km SW of Attu Station, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-02-02 18:33:49 Time when the event occurred. UTC/GMT
Updated 2017-02-23 00:08:43 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 271 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 ,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 0.937 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.58 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 201 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 us20008k7e Id of event.
Event Code 20008k7e An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us20008k7e, A comma-separated list of event ids that are associated to an event.

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