Light earthquake 4.2 mag, 246 km S of ‘Ohonua, Tonga

A light earthquake magnitude 4.2 (ml/mb) has struck on Friday, 246 km S of ‘Ohonua, Tonga (153 miles). The earthquake was roughly at a depth of 10 km (6 miles). Exact location of earthquake, longitude -175.3118 West, latitude -23.5304 South, depth = 10 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The 4.2-magnitude earthquake was detected at 15:46:33 / 3:46 pm (local time epicenter). Exact time and date of earthquake 23/10/20 / 2020-10-23 15:46:33 / October 23, 2020 @ 3:46 pm UTC/GMT. All ids that are associated to the event: us7000c7g5. Unique identifier: us7000c7g5.

There are an estimated 13,000 light earthquakes in the world each year. In the past 24 hours, there have been two, in the last 10 days three, in the past 30 days five and in the last 365 days thirty-four earthquakes of magnitude 3.0 or greater that has occurred nearby. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Questions or comments?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity 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: 246 km S of ‘Ohonua, Tonga.

`Ohonua Tonga

More information

Parameter	Value	Description
Magnitude	4.2 mb	The magnitude for the event.
Longitude	-175.3118° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	-23.5304° South	Decimal degrees latitude. Negative values for southern latitudes.
Depth	10 km	Depth of the event in kilometers.
Place	246 km 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	2020-10-23 15:46:33	Time when the event occurred. UTC/GMT
Updated	2020-11-01 15:30:00	Time when the event was most recently updated. UTC/GMT
Timezone offset		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	6.155	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	1.29 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	98	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	us7000c7g5	Id of event.
Event Code	7000c7g5	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us7000c7g5,	A comma-separated list of event ids that are associated to an event.

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Light earthquake 4.2 mag, 246 km S of ‘Ohonua, Tonga

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