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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.2 mag was detected near Saipan in Northern Mariana Islands

Earthquake location 17.7978S, 146.5746WA light earthquake magnitude 4.2 (ml/mb) has struck on Thursday, 299 km NNE of Saipan, Northern Mariana Islands (186 miles). Exact location of earthquake, longitude 146.5746 East, latitude 17.7978 North, depth = 122.32 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The epicenter was at a depth of 122.32 km (76 miles). Event id: us6000d7gd. Ids that are associated to the earthquake: us6000d7gd. Date and time of earthquake in UTC/GMT: 31/12/20 / 2020-12-31 13:56:53 / December 31, 2020 @ 1:56 pm. The 4.2-magnitude earthquake was detected at 13:56:53 / 1:56 pm (local time epicenter).

In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days three and in the last 365 days thirty-four 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. Each year there are an estimated 13,000 light earthquakes 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. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 299 km NNE of Saipan, Northern Mariana Islands. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude 146.5746° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 17.7978° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 122.32 km Depth of the event in kilometers.
Place 299 km NNE of Saipan, 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 2020-12-31 13:56:53 Time when the event occurred. UTC/GMT
Updated 2021-01-11 20:52:29 Time when the event was most recently updated. UTC/GMT
Timezone offset 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 2.657 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.93 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 98 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 us6000d7gd Id of event.
Event Code 6000d7gd An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000d7gd, A comma-separated list of event ids that are associated to an event.

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