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Light World Earthquakes Magnitude 4-4.9

Light earthquake: M4.4 quake has struck near Calama in Chile


Earthquake location -21.1099S, -68.5702WA light earthquake with magnitude 4.4 (ml/mb) was reported 154 km NNE of Calama, Chile (96 miles) on Monday. The earthquake was roughly at a depth of 134.97 km (84 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of event, depth 134.97 km, -68.5702° West, -21.1099° South. Unique identifier: us1000dr1u. Ids that are associated to the event: us1000dr1u. The 4.4-magnitude earthquake has occurred at 21:00:50 / 9:00 pm (local time epicenter). Date and time of earthquake in UTC/GMT: 24/04/18 / 2018-04-24 01:00:50 / April 24, 2018 @ 1:00 am.

There are an estimated 13,000 light earthquakes in the world each year. In the past 24 hours, there have been seven, in the last 10 days nine, in the past 30 days twelve and in the last 365 days eighty-two earthquakes of magnitude 3.0 or greater that has occurred nearby. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Did you feel it?

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: 154 km NNE of Calama, Chile. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.4 mb The magnitude for the event.
Longitude -68.5702° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -21.1099° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 134.97 km Depth of the event in kilometers.
Place 154km 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 2018-04-24 01:00:50 Time when the event occurred. UTC/GMT
Updated 2018-05-21 21:49:59 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 298 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 0.859 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.85 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 37 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 us1000dr1u Id of event.
Event Code 1000dr1u An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000dr1u, A comma-separated list of event ids that are associated to an event.

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