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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4 mag, 63 km WNW of La Ligua, Chile


Earthquake location -32.291S, -71.877WA light earthquake with magnitude 4 (ml/mb) was reported 63 kilometers (39 miles) from La Ligua in Chile on Tuesday. Exact time and date of earthquake 22/09/15 / 2015-09-22 23:25:44 / September 22, 2015 @ 11:25 pm UTC/GMT. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). All ids that are associated to the event: us20003n56. Unique identifier: us20003n56. The epicenter of the earthquake was roughly 15.7 km (10 miles) below the earth’s surface. Exact location of earthquake, -71.877° West, -32.291° South, depth 15.7 km. The 4-magnitude earthquake was detected at 18:25:44 / 6:25 pm (local time epicenter).

Event epicenter was 87 km (54 miles) from Viña del Mar (c. 294 600 pop), 86 km (54 miles) from Valparaíso (c. 282 400 pop), 88 km (55 miles) from Quillota (c. 67 800 pop), 83 km (51 miles) from Hacienda La Calera (c. 49 100 pop), 63 km (39 miles) from La Ligua (c. 24 900 pop). Close country/countries, Chile (c. 16 746 000 pop) (That might be effected). Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was Quillota, Viña del Mar, Valparaíso.

Each year there are an estimated 13,000 light earthquakes in the world. In the past 24 hours, there have been twenty-one, in the last 10 days one hundred and fifteen, in the past 30 days one hundred and fifteen and in the last 365 days one hundred and thirty earthquakes of magnitude 3.0 or greater that was reported nearby. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Did you feel the quake?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. 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: 63 km WNW of La Ligua, Chile.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -71.877° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -32.291° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 15.7 km Depth of the event in kilometers.
Place 63km WNW of La Ligua, Chile Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2015-09-22 23:25:44 Time when the event occurred. UTC/GMT
Updated 2015-09-24 22:48:42 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 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.92 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 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 us20003n56 Id of event.
Event Code 20003n56 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us20003n56, A comma-separated list of event ids that are associated to an event.

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