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Light World Earthquakes Magnitude 4-4.9

Light earthquake: M4 quake has struck near Calama in Chile

Earthquake location -21.0756S, -68.6389WA light earthquake with magnitude 4 (ml/mb) was detected on Saturday, 157 km N of Calama, Chile (98 miles). Exact location of earthquake, -68.6389° West, -21.0756° South, depth 134.15 km. The earthquake occurred at a depth of 134.15 km (83 miles) below the earth’s surface. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The temblor was detected at 08:46:19 / 8:46 am (local time epicenter). Date and time of earthquake in UTC/GMT: 11/11/17 / 2017-11-11 12:46:19 / November 11, 2017 @ 12:46 pm. Unique identifier: us2000bm07. Ids that are associated to the event: us2000bm07.

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. 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 has occurred nearby.

Questions or comments?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city 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: 157 km N of Calama, Chile.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -68.6389° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -21.0756° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 134.15 km Depth of the event in kilometers.
Place 157km N 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 2017-11-11 12:46:19 Time when the event occurred. UTC/GMT
Updated 2017-11-21 07:31:06 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 0.793 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.13 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 97 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 us2000bm07 Id of event.
Event Code 2000bm07 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000bm07, A comma-separated list of event ids that are associated to an event.

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