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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.2 mag has occurred near Agrihan in Northern Mariana Islands

Posted by admin on October 28, 2017 0 Comments

Earthquake location 20.0724S, 146.7774WA light earthquake magnitude 4.2 (ml/mb) strikes 185 km NE of Agrihan, Northern Mariana Islands (115 miles) on Saturday. Exact time and date of event in UTC/GMT: 21/10/17 / 2017-10-21 11:26:26 / October 21, 2017 @ 11:26 am. Event id: us1000axm0. Ids that are associated to the earthquake: us1000axm0. The temblor was reported at 21:26:26 / 9:26 pm (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The epicenter of the earthquake was roughly 10 km (6 miles) below the earth’s surface. Exact location of earthquake, longitude 146.7774 East, latitude 20.0724 North, depth = 10 km.

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

Did you feel the quake?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 185 km NE of Agrihan, Northern Mariana Islands.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude 146.7774° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 20.0724° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 185km NE of Agrihan, Northern Mariana Islands Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-10-21 11:26:26 Time when the event occurred. UTC/GMT
Updated 2017-10-28 06:58:35 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 271 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 8.16 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.18 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 163 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 us1000axm0 Id of event.
Event Code 1000axm0 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000axm0, A comma-separated list of event ids that are associated to an event.

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