Moderate earthquake 5.1 mag, 273 km S of `Ohonua, Tonga

A moderate earthquake magnitude 5.1 (ml/mb) has struck on Monday, 273 km S of `Ohonua, Tonga (170 miles). Unique identifier: us1000at0x. Ids that are associated to the event: us1000at0x. Exact location of earthquake, longitude -175.4036 West, latitude -23.7667 South, depth = 10 km. Exact time and date of event in UTC/GMT: 16/10/17 / 2017-10-16 20:03:11 / October 16, 2017 @ 8:03 pm. The earthquake occurred at a depth of 10 km (6 miles). The temblor was detected at 08:03:11 / 8:03 am (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Every year there are an estimated 1320 moderate earthquakes in the world. In the past 24 hours, there have been four, in the last 10 days four, in the past 30 days five and in the last 365 days twenty earthquakes of magnitude 3.0 or greater that have been detected in the same area. Earthquakes 5.0 to 6.0 may cause light damage to buildings and other structures.

How would you describe the shaking?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity 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: 273 km S of `Ohonua, Tonga.

`Ohonua Tonga

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Parameter	Value	Description
Magnitude	5.1 mb	The magnitude for the event.
Longitude	-175.4036° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	-23.7667° South	Decimal degrees latitude. Negative values for southern latitudes.
Depth	10 km	Depth of the event in kilometers.
Place	273km S of `Ohonua, Tonga	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2017-10-16 20:03:11	Time when the event occurred. UTC/GMT
Updated	2017-10-16 20:30:13	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	400	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	5.906	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	1.43 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	89	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	us1000at0x	Id of event.
Event Code	1000at0x	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us1000at0x,	A comma-separated list of event ids that are associated to an event.

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Moderate earthquake 5.1 mag, 273 km S of `Ohonua, Tonga

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