Strong but harmless seaquake – aftershock hits coastal Chile

Port of Valparaiso (Chile)

Valparaiso - Image via Wikipedia

Earthquake Report comment :
After a period of relative calm, a strong aftershock struck the Chilean coastal area. The epicenter was located in the same greater area than the devastating Magnitude 8.8 earthquake from February 27.
GDACS has issued a GREEN earthquake alert for this earthquake = very limited chance on damage and/or injuries
NO tsunami bulletins have been published.
QuakeSOS, out iPhone app for quick communication, has not been used once (usually we receive immediatly signals after scary shaking).
Because the epicenter was at a relatively big distance in the Pacific Ocean,  the maximum expected shaking for approx. 36,000 people was a Mercalli IV (light shaking).
Although the Magnitude would have created more fear, we can describe this powerful aftershock as weak.

Most important Earthquake Data:
Magnitude : 5.8
Wednesday, October 20, 2010 at 09:49:56 PM at epicenter
Depth (Hypocenter) : 7 km
Geo-location(s) :
190 km (120 miles) NW of Cauquenes, Maule, Chile
205 km (130 miles) WNW of Talca, Maule, Chile
235 km (145 miles) WSW of San Antonio, Valparaiso, Chile

Links to important maps
USGS Did You Feel It Map
Google satellite map of the area showing the kind of terrain the earthquake took place
USGS Shaking map
USGS historic earthquakes map
USGS Pager map
GDACS Green Earthquake Alert (Global Disaster Alert and Coordination System)

* GDACS (Global Disaster Alert and Coordination System) provides near real-time alerts about natural disasters around the world. GDACS is a Joint Initiative of the United Nations and the European Commission

QuakeSOS has been developed to help actively people who are caught in an earthquake + delivers "Earthquake Report" information on your iPhoneQuakeSOS is a FREE iPhone application developed by Armand Vervaeck, the creator and main contributor to Earthquake Report. The Application simplifies immediate group communication to friends and family members (with your exact GPS location) and is constantly feeding the users with “Earthquake Report” news. Together with your own family and friends, QuakeSOS will be your closest earthquake friend.

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Peru – M 4.3 – Moderate earthquake 60 km from Ica

Two people on the shore of the Pacific Ocean

Image via Wikipedia

Earthquake Report comment :
A moderate earthquake at a reasonable depth of 38 km.
What makes it special is the short distance to the coastline and to the city of Ica.
Ica had +260,000 inhabitants at the latest census.
Earthquakes in this area are the result of the convergent boundaries in between the Nazca plate (Pacific Ocean) and the South American plate (continent).
The Nazca plate is subducting the South American plate along a big distance of the South American coastline. Volcanoes and and (sometimes massive) earthquakes are a result of this process.

Most important Earthquake Data:
Saturday, August 21, 2010 at 07:40:46 AM at epicenter
Depth (Hypocenter) : 38 km
Geo-location(s) :
60 km (35 miles) WSW of Ica, Peru
90 km (55 miles) S of Chincha Alta, Peru
255 km (160 miles) SSE of LIMA, Peru

Links to important maps
Google satellite map of the area showing the kind of terrain the earthquake took place
USGS historic earthquakes map

QuakeSOS has been developed to help actively people who are caught in an earthquake + delivers "Earthquake Report" information on your iPhoneQuakeSOS is a FREE  iPhone application developed by Armand Vervaeck, the creator and main contributor to Earthquake Report.  The Application simplifies immediate group communication to friends and family members (with your exact GPS location) and is constantly feeding the users with “Earthquake Report” news. Together with your own family and friends, QuakeSOS will be your closest earthquake friend.

Guatemala– M 4.8 – Small and fairly deep earthquake near the Guatemala – El Salvador coast

Earthquake Report comment :
A very light earthquake struck at the Guatemala coast in the evening hours of July 30.
Due to the depth, some people will not even have felt the quake.
USGS has received only 1 ‘weak’ shaking alert out of Guatemala City.

Most important Earthquake Data:
Friday, July 30, 2010 at 11:15:13 PM at epicenter
Depth (Hypocenter) : 76 km
Geolocation(s) :
70 km (45 miles) W of Acajutla, El Salvador
95 km (60 miles) SSE of Escuintla, Guatemala
140 km (85 miles) W of SAN SALVADOR, El Salvador

Links to important maps
USGS Did You Feel It Map

Fiji / Tonga – M 5.1 – Earthquake in the Pacific at a safe distance from the closest islands

Earthquake Report comment :
Very active seismic area.
As this earthquake occurred at a depth of 96 km, the impact on buildings, humans will be limited.
USGS calculated models are mentioning light to moderate shaking at maximum.

Most important Earthquake Data:
Saturday, July 31, 2010 at 06:19:33 AM at epicenter
Depth (Hypocenter) : 89 km
Geolocation(s) :
135 km (85 miles) W of NUKU`ALOFA, Tonga
235 km (145 miles) ESE of Ndoi Island, Fiji
385 km (240 miles) SW of Neiafu, Tonga

Links to important maps
USGS Did You Feel It Map

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