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Light earthquake: M4.2 quake has struck near Greymouth in New Zealand


Earthquake location -42.7872S, 171.6885WA light earthquake magnitude 4.2 (ml/mb) has struck on Thursday, 53 kilometers (33 miles) from Greymouth in New Zealand. 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 09:34:04 / 9:34 am (local time epicenter). Exact time and date of earthquake 11/01/17 / 2017-01-11 21:34:04 / January 11, 2017 @ 9:34 pm UTC/GMT. The earthquake was roughly at a depth of 12.66 km (8 miles). Event ids that are associated to the earthquake: us10007smk. Id of event: us10007smk. Exact location of earthquake, longitude 171.6885 East, latitude -42.7872 South, depth = 12.66 km.

Epicenter of the event was 54 km (33 miles) from Greymouth (c. 9 400 pop). Country/countries that might be effected, New Zealand (c. 4 252 000 pop). Nearest cities/city/villages to epicentrum/hypocenter was Greymouth (min 5000 pop).

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. There are an estimated 13,000 light quakes 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 eighteen earthquakes of magnitude 3.0 or greater that have been detected nearby.

Questions or comments?

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. 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: 53 km SE of Greymouth, New Zealand.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude 171.6885° East Decimal degrees longitude. Negative values for western longitudes.
Latitude -42.7872° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 12.66 km Depth of the event in kilometers.
Place 53km SE of Greymouth, New Zealand Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-01-11 21:34:04 Time when the event occurred. UTC/GMT
Updated 2017-01-12 00:14:35 Time when the event was most recently updated. UTC/GMT
Timezone offset 720 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 0.19 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.93 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 48 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 us10007smk Id of event.
Event Code 10007smk An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us10007smk, A comma-separated list of event ids that are associated to an event.

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