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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4 mag, 81 km ENE of Adak, Alaska

Posted by admin on October 30, 2017 0 Comments

Earthquake location 52.25S, -175.6304WA light earthquake magnitude 4 (ml/mb) has struck on Sunday, 81 km ENE of Adak, Alaska (50 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The 4-magnitude earthquake was detected at 06:41:45 / 6:41 am (local time epicenter). Exact time and date of event in UTC/GMT: 15/10/17 / 2017-10-15 16:41:45 / October 15, 2017 @ 4:41 pm. Unique identifier: us1000auuf. Ids that are associated to the event: ak17050296, us1000auuf. Exact location of earthquake, longitude -175.6304 West, latitude 52.25 North, depth = 187.59 km. The earthquake occurred at a depth of 187.59 km (117 miles) below the earth’s surface.

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

Did you feel anything?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. 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: 81 km ENE of Adak, Alaska.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -175.6304° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 52.25° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 187.59 km Depth of the event in kilometers.
Place 81km ENE of Adak, Alaska Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-10-15 16:41:45 Time when the event occurred. UTC/GMT
Updated 2017-10-30 19:24:16 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 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 0.308 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.62 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 105 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 us1000auuf Id of event.
Event Code 1000auuf An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ak17050296,us1000auuf, A comma-separated list of event ids that are associated to an event.

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