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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4 mag strikes near Arica in Chile


Earthquake location -19.1337S, -70.5761WA light earthquake with magnitude 4 (ml/mb) was detected on Tuesday, 78 kilometers (48 miles) from Arica in Chile. The epicenter was at a depth of 53.9 km (33 miles). Exact location of event, longitude -70.5761 West, latitude -19.1337 South, depth = 53.9 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The temblor was reported at 04:05:48 / 4:05 am (local time epicenter). Global time and date of event 18/02/20 / 2020-02-18 09:05:48 / February 18, 2020 @ 9:05 am UTC/GMT. All ids that are associated to the event: us70007sal. Unique identifier: us70007sal.

Epicenter of the earthquake was 79 km (49 miles) from Arica (c. 186 000 pop). Nearby country/countries that might be effected, Chile (c. 16 746 000 pop). Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was Arica.

In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days two and in the last 365 days twenty-one earthquakes of magnitude 3.0 or greater that has struck near. 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.

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 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: 78 km SSW of Arica, Chile.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -70.5761° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -19.1337° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 53.9 km Depth of the event in kilometers.
Place 78km SSW of Arica, Chile Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2020-02-18 09:05:48 Time when the event occurred. UTC/GMT
Updated 2020-02-22 06:55:31 Time when the event was most recently updated. UTC/GMT
Timezone offset -300 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 0.567 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 194 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 us70007sal Id of event.
Event Code 70007sal An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us70007sal, A comma-separated list of event ids that are associated to an event.

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