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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.7 mag has occurred near Arica in Chile

Earthquake location -18.4087S, -70.1454WA light earthquake with magnitude 4.7 (ml/mb) was detected on Saturday, 18 kilometers (11 miles) from Arica in Chile. Exact time and date of earthquake 26/12/15 / 2015-12-26 11:42:18 / December 26, 2015 @ 11:42 am UTC/GMT. The earthquake occurred at a depth of 52.45 km (33 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The temblor was detected at 08:42:18 / 8:42 am (local time epicenter). Exact location of earthquake, -70.1454° West, -18.4087° South, depth 52.45 km. Unique identifier: us10004apz. Ids that are associated to the event: us10004apz.

Country/countries that might be effected, Chile (c. 16 746 000 pop), Peru (c. 29 907 000 pop). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Tacna, Arica. The epicenter was 45 km (28 miles) from Tacna (c. 280 100 pop), 18 km (11 miles) from Arica (c. 186 000 pop).

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 twenty-one 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 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. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 18 km ENE of Arica, Chile. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.7 mb The magnitude for the event.
Longitude -70.1454° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -18.4087° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 52.45 km Depth of the event in kilometers.
Place 18km ENE of Arica, Chile Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2015-12-26 11:42:18 Time when the event occurred. UTC/GMT
Updated 2016-01-08 09:24:53 Time when the event was most recently updated. UTC/GMT
Timezone offset -180 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 340 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 0.19 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.57 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 93 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 us10004apz Id of event.
Event Code 10004apz An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us10004apz, A comma-separated list of event ids that are associated to an event.

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