Light earthquake 4.6 mag, 255 km SSW of `Ohonua, Tonga

A light earthquake with magnitude 4.6 (ml/mb) was reported 255 km SSW of `Ohonua, Tonga (158 miles) on Wednesday. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Id of earthquake: us20006hhg. Event ids that are associated: us20006hhg. The 4.6-magnitude earthquake was detected at 03:56:43 / 3:56 am (local time epicenter). Exact time and date of event in UTC/GMT: 20/07/16 / 2016-07-20 15:56:43 / July 20, 2016 @ 3:56 pm. Exact location of event, longitude -175.4993 West, latitude -23.5878 South, depth = 10 km. The earthquake was roughly at a depth of 10 km (6 miles).

In the past 24 hours, there have been seven, in the last 10 days seven, in the past 30 days eight and in the last 365 days nineteen earthquakes of magnitude 3.0 or greater that have been detected nearby. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. Every year there are an estimated 13,000 light earthquakes in the world.

Questions or comments?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 255 km SSW of `Ohonua, Tonga. This information comes from the USGS Earthquake Notification Service.

`Ohonua Tonga

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Parameter	Value	Description
Magnitude	4.6 mb	The magnitude for the event.
Longitude	-175.4993° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	-23.5878° South	Decimal degrees latitude. Negative values for southern latitudes.
Depth	10 km	Depth of the event in kilometers.
Place	255km SSW 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	2016-07-20 15:56:43	Time when the event occurred. UTC/GMT
Updated	2016-07-27 23:49:14	Time when the event was most recently updated. UTC/GMT
Timezone offset	-720	Timezone offset from UTC in minutes at the event epicenter.
Felt	0	The total number of felt reports
CDI	1	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	326	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	6.864	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.59 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	104	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	us20006hhg	Id of event.
Event Code	20006hhg	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us20006hhg,	A comma-separated list of event ids that are associated to an event.

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Light earthquake 4.6 mag, 255 km SSW of `Ohonua, Tonga

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