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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4 mag was detected near Calama in Chile


Earthquake location -21.6801S, -68.3763WA light earthquake magnitude 4 (ml/mb) has occurred on Wednesday, 104 km NNE of Calama, Chile (65 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Unique identifier: us10007gma. Ids that are associated to the event: us10007gma. The 4-magnitude earthquake was detected at 09:00:38 / 9:00 am (local time epicenter). Exact location of earthquake, longitude -68.3763 West, latitude -21.6801 South, depth = 111.67 km. The earthquake occurred at a depth of 111.67 km (69 miles). Exact time and date of event in UTC/GMT: 07/12/16 / 2016-12-07 13:00:38 / December 7, 2016 @ 1:00 pm.

Each year there are an estimated 13,000 light quakes in the world. In the past 24 hours, there have been three, in the last 10 days four, in the past 30 days ten and in the last 365 days eighty-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.

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. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 104 km NNE of Calama, Chile.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -68.3763° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -21.6801° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 111.67 km Depth of the event in kilometers.
Place 104km 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 2016-12-07 13:00:38 Time when the event occurred. UTC/GMT
Updated 2017-01-04 09:51:59 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 246 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 0.813 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.88 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 47 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 us10007gma Id of event.
Event Code 10007gma An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us10007gma, A comma-separated list of event ids that are associated to an event.

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