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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.6 mag, 92 km NNE of Calama, Chile


Earthquake location -21.6778S, -68.625WA light earthquake magnitude 4.6 (ml/mb) has occurred on Saturday, 92 kilometers (57 miles) from Calama in Chile. The temblor was reported at 10:28:25 / 10:28 am (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Date and time of earthquake in UTC/GMT: 22/12/18 / 2018-12-22 14:28:25 / December 22, 2018 @ 2:28 pm. Id of earthquake: us2000iwau. Event ids that are associated: us2000iwau. Exact location of earthquake, longitude -68.625 West, latitude -21.6778 South, depth = 141.1 km. The earthquake occurred at a depth of 141.1 km (88 miles) below the earth’s surface.

The epicenter was 92 km (57 miles) from Calama (c. 143 100 pop). Closest city/cities/towns to epicentrum/hypocenter was Calama (min 5000 pop). Country/countries that might be effected, Chile (c. 16 746 000 pop).

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

Questions or comments?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage at your home, city 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: 92 km NNE of Calama, Chile.

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More information

Parameter Value Description
Magnitude 4.6 mb The magnitude for the event.
Longitude -68.625° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -21.6778° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 141.1 km Depth of the event in kilometers.
Place 92km NNE of Calama, Chile Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-12-22 14:28:25 Time when the event occurred. UTC/GMT
Updated 2019-01-20 16:06:52 Time when the event was most recently updated. UTC/GMT
Timezone offset -240 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 326 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 0.585 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.54 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 49 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 us2000iwau Id of event.
Event Code 2000iwau An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000iwau, A comma-separated list of event ids that are associated to an event.

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