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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.3 mag strikes near Ambanja in Madagascar

Earthquake location -14.1162S, 47.8562WA light earthquake magnitude 4.3 (ml/mb) strikes 81 kilometers (50 miles) from Ambanja in Madagascar on Thursday. Global date and time of event UTC/GMT: 31/12/20 / 2020-12-31 20:19:33 / December 31, 2020 @ 8:19 pm. Exact location of earthquake, 47.8562° East, -14.1162° South, depth 14.23 km. Id of earthquake: us6000d7gm. Event ids that are associated: us6000d7gm. The epicenter was at a depth of 14.23 km (9 miles). The temblor was detected at 20:19:33 / 8:19 pm (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Closest city/cities/towns to epicentrum/hypocenter was Hell-Ville, Antsohihy, Ambanja (min 5000 pop). Epicenter of the earthquake was 80 km (50 miles) from Ambanja (c. 30 600 pop), 91 km (57 miles) from Hell-Ville (c. 22 700 pop), 86 km (53 miles) from Antsohihy (c. 21 300 pop). Close country/countries, Madagascar (c. 21 282 000 pop) (That might be effected).

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 one earthquakes of magnitude 3.0 or greater that was reported 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.

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, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 81 km SW of Ambanja, Madagascar. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.3 mb The magnitude for the event.
Longitude 47.8562° East Decimal degrees longitude. Negative values for western longitudes.
Latitude -14.1162° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 14.23 km Depth of the event in kilometers.
Place 81 km SW of Ambanja, Madagascar 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 20:19:33 Time when the event occurred. UTC/GMT
Updated 2021-01-27 20:54:46 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 284 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 4.475 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.69 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 80 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 us6000d7gm Id of event.
Event Code 6000d7gm An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000d7gm, A comma-separated list of event ids that are associated to an event.

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