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Light earthquake: M4.1 quake has struck near Little Sitkin Island in Alaska



Earthquake location 50.7012S, 178.8798WA light earthquake magnitude 4.1 (ml/mb) has struck on Wednesday, 141 km S of Little Sitkin Island, Alaska (88 miles). The earthquake occurred at a depth of 10 km (6 miles) below the earth’s surface. Id of earthquake: us100098zp. Event ids that are associated: us100098zp. Exact time and date of earthquake 11/07/17 / 2017-07-11 23:42:42 / July 11, 2017 @ 11:42 pm UTC/GMT. The temblor was reported at 11:42:42 / 11:42 am (local time epicenter). Exact location of event, longitude 178.8798 East, latitude 50.7012 North, depth = 10 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

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

Did you feel it?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home and country. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 141 km S of Little Sitkin Island, Alaska. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.1 mb The magnitude for the event.
Longitude 178.8798° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 50.7012° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 141km S of Little Sitkin 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 2017-07-11 23:42:42 Time when the event occurred. UTC/GMT
Updated 2017-07-12 00:12:16 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 259 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 0.727 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.2 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 238 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 us100098zp Id of event.
Event Code 100098zp An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us100098zp, A comma-separated list of event ids that are associated to an event.

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