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Light World Earthquakes Magnitude 4-4.9

Light earthquake: M4.1 quake has struck near Malisbeng in Philippines

Earthquake location 4.5321S, 123.4402WA light earthquake with magnitude 4.1 (ml/mb) was detected on Monday, 202 km SSW of Malisbeng, Philippines (126 miles). Exact location of event, longitude 123.4402 East, latitude 4.5321 North, depth = 520.15 km. Date and time of earthquake in UTC/GMT: 21/12/15 / 2015-12-21 11:25:01 / December 21, 2015 @ 11:25 am. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The earthquake occurred at a depth of 520.15 km (323 miles) below the earth’s surface. Id of earthquake: us10004992. Event ids that are associated: us10004992. The 4.1-magnitude earthquake has occurred at 19:25:01 / 7:25 pm (local time epicenter).

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

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. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 202 km SSW of Malisbeng, Philippines.

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More information

Parameter Value Description
Magnitude 4.1 mb The magnitude for the event.
Longitude 123.4402° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 4.5321° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 520.15 km Depth of the event in kilometers.
Place 202km SSW of Malisbeng, Philippines Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2015-12-21 11:25:01 Time when the event occurred. UTC/GMT
Updated 2016-01-03 10:31:25 Time when the event was most recently updated. UTC/GMT
Timezone offset 480 Timezone offset from UTC in minutes at the event epicenter.
Felt 0 The total number of felt reports
CDI 1 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 4.312 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.33 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 103 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 us10004992 Id of event.
Event Code 10004992 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us10004992, A comma-separated list of event ids that are associated to an event.

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