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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4 mag strikes near San Isidro in Peru

Earthquake location -12.56S, -77.29WA light earthquake with magnitude 4 (ml/mb) was detected on Friday, 55 kilometers (34 miles) from San Isidro in Peru. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Date and time of earthquake in UTC/GMT: 22/01/16 / 2016-01-22 09:19:51 / January 22, 2016 @ 9:19 am. The 4-magnitude earthquake was detected at 04:19:51 / 4:19 am (local time epicenter). Exact location of event, longitude -77.29 West, latitude -12.56 South, depth = 31 km. Id of earthquake: us10004gwh. Event ids that are associated: us10004gwh. The earthquake was roughly at a depth of 31 km (19 miles).

Epicenter of the earthquake was 64 km (40 miles) from Lima (c. 7 737 000 pop), 59 km (37 miles) from Callao (c. 813 300 pop), 56 km (35 miles) from Surco (c. 251 600 pop), 56 km (35 miles) from San Isidro (c. 68 300 pop), 72 km (45 miles) from Mala (c. 17 300 pop), 75 km (47 miles) from Santa María (c. 14 900 pop). Closest city/cities/towns to epicentrum/hypocenter was Santa María, Mala, Lima (min 5000 pop). Close country/countries that might be effected, Peru (c. 29 907 000 pop).

Each year there are an estimated 13,000 light earthquakes in the world. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. 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 five earthquakes of magnitude 3.0 or greater that have been detected nearby.

Did you feel anything?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking and damage at your home, city 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: 55 km SSW of San Isidro, Peru.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -77.29° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -12.56° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 31 km Depth of the event in kilometers.
Place 55km SSW of San Isidro, Peru Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2016-01-22 09:19:51 Time when the event occurred. UTC/GMT
Updated 2016-01-24 22:18:13 Time when the event was most recently updated. UTC/GMT
Timezone offset -300 Timezone offset from UTC in minutes at the event epicenter.
Felt 2 The total number of felt reports
CDI 2.8 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 247 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 0.55 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 ml The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID us10004gwh Id of event.
Event Code 10004gwh An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us10004gwh, A comma-separated list of event ids that are associated to an event.

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