The United States Geological Survey recorded
a Magnitude 5.1 Earthquake at a depth of 142.7 km approximately 7 km to
the northeast of the town of El Payon in Santander Department,
Colombia, at about 8.35 pm local time on Saturday 30 September 2017
(at about 1.35 am on Sunday 1 October, GMT).. There are no
reports of
any damage or casualties associated with this event, but people
have reported feeling the event across much of northern Colombia and
western Venezuala.
The approximate location of the 30 September 2017 Santander Earthquake. USGS.
Colombia
is on the west coast of South America and the western margin of the
South American Plate, close to where the Nazca Plate, which underlies
part of the east Pacific, is being subducted along the Peru-Chile
Trench. The Nazca Plate passes under the South American Plate as it
sinks into the Earth, this is not a smooth process and the plates
repeatedly stick together then break apart as the pressure builds up,
causing Earthquakes. As the Nazca Plate sinks further it is partially
melted by the friction and the heat of the Earth's interior. Some of
this melted material then rises through the overlying South American
Plate, fuelling the volcanoes of Colombia and neighbouring countries.
The subduction of the Nazca Plate beneath the South American Plate, and how it causes Earthquakes and volcanoes. SIO SEARCH.
Witness
accounts of Earthquakes can help geologists to understand these events,
and the structures that cause them. The international non-profit
organisation Earthquake Report is interested in hearing from people who may have felt this event; if you felt this quake then you can report it to Earthquake Report here.
See also...
