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Light World Earthquakes Magnitude 4-4.9

Light earthquake: M4 quake has struck near Amatignak Island in Alaska

Posted by admin on August 22, 2018 0 Comments

Earthquake location 50.8378S, -178.2955WA light earthquake with magnitude 4 (ml/mb) was detected on Monday, 74 km SE of Amatignak Island, Alaska (46 miles). The temblor was detected at 03:40:20 / 3:40 am (local time epicenter). Event ids that are associated to the earthquake: us1000gbh1. Id of event: us1000gbh1. Exact location of event, depth 10 km, -178.2955° West, 50.8378° North. Exact time and date of event in UTC/GMT: 13/08/18 / 2018-08-13 15:40:20 / August 13, 2018 @ 3:40 pm. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The earthquake occurred at a depth of 10 km (6 miles).

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 fifteen, in the past 30 days eighteen and in the last 365 days one hundred and eighty-seven earthquakes of magnitude 3.0 or greater that have been detected in the same area. There are an estimated 13,000 light quakes in the world each year.

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. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 74 km SE of Amatignak Island, Alaska. This information 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 -178.2955° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 50.8378° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 74km SE of Amatignak Island, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-08-13 15:40:20 Time when the event occurred. UTC/GMT
Updated 2018-08-22 16:57:40 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 ,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 1.243 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.53 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 227 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 us1000gbh1 Id of event.
Event Code 1000gbh1 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000gbh1, A comma-separated list of event ids that are associated to an event.

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