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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4 mag has occurred near Tanaga Volcano in Alaska

Posted by admin on October 20, 2017 0 Comments

Earthquake location 52.3354S, -178.7871WA light earthquake with magnitude 4 (ml/mb) was detected on Wednesday, 66 km NW of Tanaga Volcano, Alaska (41 miles). The earthquake was roughly at a depth of 203.67 km (127 miles). Id of earthquake: us2000av0g. Event ids that are associated: ak16911531, us2000av0g. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact time and date of earthquake 21/09/17 / 2017-09-21 00:17:16 / September 21, 2017 @ 12:17 am UTC/GMT. Exact location of earthquake, -178.7871° West, 52.3354° North, depth 203.67 km. The temblor was detected at 12:17:16 / 12:17 pm (local time epicenter).

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

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: 66 km NW of Tanaga Volcano, Alaska.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -178.7871° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 52.3354° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 203.67 km Depth of the event in kilometers.
Place 66km NW of Tanaga Volcano, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-09-21 00:17:16 Time when the event occurred. UTC/GMT
Updated 2017-10-20 05:05:07 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 0.518 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.66 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 137 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 us2000av0g Id of event.
Event Code 2000av0g An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak16911531,us2000av0g, A comma-separated list of event ids that are associated to an event.

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