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Light earthquake: M4.5 quake has struck near Agrihan in Northern Mariana Islands

Posted by admin on December 20, 2018 0 Comments

Earthquake location 18.8837S, 145.3841WA light earthquake magnitude 4.5 (ml/mb) strikes 32 km WNW of Agrihan, Northern Mariana Islands (20 miles) on Friday. All ids that are associated to the event: us2000ive4. Unique identifier: us2000ive4. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of event, depth 237.98 km, 145.3841° East, 18.8837° North. The epicenter of the earthquake was roughly 237.98 km (148 miles) below the earth’s surface. The 4.5-magnitude earthquake has occurred at 01:32:12 / 1:32 am (local time epicenter). Global date and time of event UTC/GMT: 20/12/18 / 2018-12-20 15:32:12 / December 20, 2018 @ 3:32 pm.

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

Questions or comments?

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. 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: 32 km WNW of Agrihan, Northern Mariana Islands.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude 145.3841° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 18.8837° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 237.98 km Depth of the event in kilometers.
Place 32km WNW 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 2018-12-20 15:32:12 Time when the event occurred. UTC/GMT
Updated 2018-12-20 17:10:18 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 312 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 5.287 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.92 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 87 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 us2000ive4 Id of event.
Event Code 2000ive4 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000ive4, A comma-separated list of event ids that are associated to an event.

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