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Light earthquake: M4.1 quake has struck near Kodiak in Alaska

Posted by admin on April 21, 2018 0 Comments

Earthquake location 56.2092S, -149.4366WA light earthquake magnitude 4.1 (ml/mb) has occurred on Saturday, 252 km SE of Kodiak, Alaska (157 miles). Event ids that are associated to the earthquake: us1000dpy4. Id of event: us1000dpy4. Exact location, longitude -149.4366° West, latitude 56.2092° North, depth = 19.5 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The temblor was detected at 07:04:56 / 7:04 am (local time epicenter). Date and time of earthquake in UTC/GMT: 21/04/18 / 2018-04-21 17:04:56 / April 21, 2018 @ 5:04 pm. The epicenter was at a depth of 19.5 km (12 miles).

Each year there are an estimated 13,000 light earthquakes in the world. In the past 24 hours, there have been two, in the last 10 days fourty-nine, in the past 30 days two hundred and ninety-two and in the last 365 days three thousand, two hundred and fourty-eight earthquakes of magnitude 3.0 or greater that have been detected in the same area. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Did you feel anything?

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: 252 km SE of Kodiak, Alaska.

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More information

Parameter Value Description
Magnitude 4.1 mb The magnitude for the event.
Longitude -149.4366° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 56.2092° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 19.5 km Depth of the event in kilometers.
Place 252km SE of Kodiak, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-04-21 17:04:56 Time when the event occurred. UTC/GMT
Updated 2018-04-21 17:33:07 Time when the event was most recently updated. UTC/GMT
Timezone offset -600 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 2.335 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 143 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 us1000dpy4 Id of event.
Event Code 1000dpy4 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000dpy4, A comma-separated list of event ids that are associated to an event.

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