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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.7 mag strikes near San Martin in Argentina


Earthquake location -33.842S, -68.3977WA light earthquake with magnitude 4.7 (ml/mb) was reported 84 kilometers (52 miles) from San Martin in Argentina on Tuesday. Exact time and date of event in UTC/GMT: 18/12/18 / 2018-12-18 21:29:45 / December 18, 2018 @ 9:29 pm. The earthquake occurred at a depth of 15.48 km (10 miles). Id of earthquake: us2000iuwm. Event ids that are associated: us2000iuwm. Exact location of earthquake, -68.3977° West, -33.842° South, depth 15.48 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The 4.7-magnitude earthquake was detected at 18:29:45 / 6:29 pm (local time epicenter).

Event epicenter was 86 km (54 miles) from San Rafael (c. 109 200 pop), 85 km (53 miles) from San Martín (c. 82 500 pop). Closest city/cities/towns to epicentrum/hypocenter was San Rafael, San Martín (min 5000 pop). Nearby country/countries, Argentina (c. 41 343 000 pop) (That might be effected).

There are an estimated 13,000 light earthquakes in the world each year. In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days one and in the last 365 days seven 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.

Did you feel it?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city 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: 84 km S of San Martin, Argentina.

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More information

Parameter Value Description
Magnitude 4.7 mb The magnitude for the event.
Longitude -68.3977° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -33.842° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 15.48 km Depth of the event in kilometers.
Place 84km S of San Martin, Argentina Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-12-18 21:29:45 Time when the event occurred. UTC/GMT
Updated 2018-12-22 01:27:05 Time when the event was most recently updated. UTC/GMT
Timezone offset -180 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 340 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 1.407 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.09 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 40 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 us2000iuwm Id of event.
Event Code 2000iuwm An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000iuwm, A comma-separated list of event ids that are associated to an event.

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