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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.6 mag, 124 km WNW of Attu Station, Alaska

Earthquake location 53.3488S, 171.5266WA light earthquake magnitude 4.6 (ml/mb) strikes 124 km WNW of Attu Station, Alaska (77 miles) on Thursday. The epicenter was at a depth of 25.72 km (16 miles). Global time and date of event 20/07/17 / 2017-07-20 04:24:43 / July 20, 2017 @ 4:24 am UTC/GMT. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The temblor was picked up at 15:24:43 / 3:24 pm (local time epicenter). Exact location of event, depth 25.72 km, 171.5266° East, 53.3488° North. Unique identifier: us20009yc3. Ids that are associated to the event: us20009yc3.

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

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. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 124 km WNW of Attu Station, Alaska.

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More information

Parameter Value Description
Magnitude 4.6 mb The magnitude for the event.
Longitude 171.5266° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 53.3488° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 25.72 km Depth of the event in kilometers.
Place 124km WNW 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 2017-07-20 04:24:43 Time when the event occurred. UTC/GMT
Updated 2017-08-18 03:10:32 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 326 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 1.672 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.54 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 149 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 us20009yc3 Id of event.
Event Code 20009yc3 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us20009yc3, A comma-separated list of event ids that are associated to an event.

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