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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.2 mag, 23 km NNW of Vallenar, Chile


Earthquake location -28.3714S, -70.8426WA light earthquake magnitude 4.2 (ml/mb) strikes 23 kilometers (14 miles) from Vallenar in Chile on Sunday. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The 4.2-magnitude earthquake has occurred at 06:24:37 / 6:24 am (local time epicenter). Global date and time of event UTC/GMT: 01/10/17 / 2017-10-01 10:24:37 / October 1, 2017 @ 10:24 am. Event id: us2000axgg. Ids that are associated to the earthquake: us2000axgg. Exact location of earthquake, -70.8426° West, -28.3714° South, depth 60.82 km. The epicenter was at a depth of 60.82 km (38 miles).

Country/countries that might be effected, Chile (c. 16 746 000 pop). Nearest cities/city/villages to epicentrum/hypocenter was Vallenar (min 5000 pop). Epicenter of the earthquake was 24 km (15 miles) from Vallenar (c. 44 900 pop).

In the past 24 hours, there have been two, in the last 10 days five, in the past 30 days five and in the last 365 days twenty-five earthquakes of magnitude 3.0 or greater that have been detected in the same area. Each year there are an estimated 13,000 light quakes in the world. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Questions or comments?

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. 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: 23 km NNW of Vallenar, Chile.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude -70.8426° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -28.3714° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 60.82 km Depth of the event in kilometers.
Place 23km NNW of Vallenar, Chile Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-10-01 10:24:37 Time when the event occurred. UTC/GMT
Updated 2017-10-14 06:19:59 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 271 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 0.263 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 88 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 us2000axgg Id of event.
Event Code 2000axgg An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000axgg, A comma-separated list of event ids that are associated to an event.

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