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Light earthquake, 4.3 mag strikes near Illapel in Chile


Earthquake location -31.5512S, -71.5771WA light earthquake with magnitude 4.3 (ml/mb) was detected on Saturday, 40 kilometers (25 miles) from Illapel in Chile. The 4.3-magnitude earthquake was detected at 20:21:54 / 8:21 pm (local time epicenter). Exact location of earthquake, longitude -71.5771 West, latitude -31.5512 South, depth = 47.35 km. Event ids that are associated to the earthquake: us2000d7jf. Id of event: us2000d7jf. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact time and date of earthquake 25/02/18 / 2018-02-25 00:21:54 / February 25, 2018 @ 12:21 am UTC/GMT. The earthquake occurred at a depth of 47.35 km (29 miles).

The epicenter was 40 km (25 miles) from Illapel (c. 22 800 pop), 63 km (39 miles) from Salamanca (c. 13 300 pop). Nearby country/countries that might be effected, Chile (c. 16 746 000 pop). Nearest cities/city/towns to hypocenter/epicentrum was Salamanca, Illapel (min 5000 pop).

There are an estimated 13,000 light quakes in the world each year. In the past 24 hours, there have been one, in the last 10 days three, in the past 30 days five and in the last 365 days fifty-six 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.

How would you describe the shaking?

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: 40 km WNW of Illapel, Chile.

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More information

Parameter Value Description
Magnitude 4.3 mb The magnitude for the event.
Longitude -71.5771° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -31.5512° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 47.35 km Depth of the event in kilometers.
Place 40km WNW of Illapel, Chile Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-02-25 00:21:54 Time when the event occurred. UTC/GMT
Updated 2018-02-25 02:57:40 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 284 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 0.602 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.87 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 163 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 us2000d7jf Id of event.
Event Code 2000d7jf An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000d7jf, A comma-separated list of event ids that are associated to an event.

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