Indonesia – M 5.5 – Moderate earthquake in Java (update)

Latest update below in green.

Earthquake Report comment :
A moderate but dangerous earthquake struck on the coast of Java, only 75 km from Bandung.
GDACS has issued a ORANGE earthquake alert = moderately dangerous.
The earthquake occurred in the middle of the night a 2:10 AM
123,000 people live in a radius of only 5 km from the epicenter
303,000 people live in a radius of only 10 km from the epicenter
716,000 people live in a radius of only 20 km from the epicenter
2,176,000 people live in a radius of only 50 km from the epicenter
14,423,900 people live in a radius of only 5 km from the epicenter
Calculation models from USGS predict a strong shaking in the epicenter area. The earthquake will certainly have been felt in a big pert of Java. A this time (1 u 20 after the quake struck) no reports have been published on the local Indonesian English media.

Update 21:43 UTC : No special news bulletins or on-line news in the Indonesian on line news-sites.  Although it is still the middle of the night in Indonesia, we can conclude that people have not been alarmed by this event. In case other news appears, we will inform directly. We hope that the confirmation of NO damage and NO injuries will follow soon.
A lot of confusion about the hypocenter (depth).
EMSC is reporting a depth of 80 km.
BMKG (Indonesia) is stating only 10 km and a Magnitude of M 5.8, but with an epicenter in the sea

Final Update 22:15 UTC : Taking into account local witnesses and the data of the local BMKG seismological department, there will be a very limited risk on damage and/or injuries as the epicenter, contrary to earlier reports from USGS, is 50 km out in the Ocean. This earthquake would have been potentially dangerous when the epicenter would have been under the island. ER is relieved that all will be OK.

Most important Earthquake Data:
Thursday, August 12, 2010 at 02:10:21 AM at epicenter
Depth (Hypocenter) : 33 km
Geo-location(s) :
65 km (40 miles) SSE of Sukabumi, Java, Indonesia (125 km BMKG)
75 km (50 miles) SW of Bandung, Java, Indonesia

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
GDACS ORANGE 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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Iran – M 5.0 – Moderate but dangerous shallow earthquake near the Iran – Turkmenistan border

Earthquake Report comment :
A shallow moderate earthquake struck the Bojnurd area in Northeastern Iran at 20:56 in the evening.
Even moderate quakes can result in Iran in a lot of damage.
Bonjurd has a population of 192,000.
So far we have seen no reports of the Iran media on this quake. Official Iran media is almost the only source of information in this part of the world.

Iran is criss-crossed with fault lines and is regularly hit by earthquakes, experiencing at least one slight tremor every day on average.
The worst in recent times hit Bam in southeastern Kerman province in December 2003, killing 31,000 people – about a quarter of its population – and destroying the city’s ancient mud-built citadel.
The deadliest quake in the country was in June 1990 and measured 7.7 on the Richter scale. About 37,000 people were killed and more than 100,000 injured in the northwestern provinces of Gilan and Zanjan. It devastated 27 towns and about 1,870 villages.

Update UTC 10:03 on August 12 : Iranian press tv : No reports of any casualties or damage yet.

Most important Earthquake Data:
Wednesday, August 11, 2010 at 08:56:21 PM at epicenter
Depth (Hypocenter) : 10 km
Geo-location(s) :
50 km (30 miles) NNW of Bojnurd, Iran
110 km (70 miles) W of ASHGABAT, Turkmenistan

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

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.

Understanding the Vanuatu M 7.3 earthquake

Which are Nature’s triggers for the massive Vanuatu earthquake from August 10,2010 ?

Courtesy : Wikipedia and USGS

Courtesy : Wikipedia and USGS

In plate tectonics, a convergent boundary also known as a destructive plate boundary (because of subduction), is an actively deforming region where two (or more) tectonic plates or fragments of lithosphere move toward one another and collide.
A
s a result of pressure, friction, and plate material melting in the mantle, earthquakes and volcanoes are common near convergent boundaries.
When two plates move towards one another, they form either a subduction zone.
This depends on the nature of the plates involved. In a subduction zone, the subducting plate, which is normally a plate with oceanic crust, moves beneath the other plate, which can be made of either oceanic or continental crust.

When two plates with oceanic crust converge they typically create an island arc as one plate is subducted below the other. The arc is formed from volcanoes which erupt through the overriding plate as the descending plate melts below it.
The arc shape occurs because of the spherical surface of the earth (nick the peel of an orange with a knife and note the arc formed by the straight-edge of the knife).

A deep undersea trench is located in front of such arcs where the descending slab dips downward, such as the Mariana trench near the Mariana Islands. Other good examples of this type of plate convergence would be Japan and the Aleutian Islands in Alaska.
The Vanuatu trench near the island of Efate can be seen very clearly on the satellite maps below.
When both of the plates are made of oceanic crust, convergence is associated with island arcs such as the Solomon Islands.


Main source text and graphics :  Wikipedia

Earthquakes list August 11, 2010

Useful information to read this daily earthquake list
This earthquake list covers minor and major earthquakes  in the world.
If a more detailed page is present, the earthquake line will be linked to the detailed page.
For your comfort, we will provide in most cases Google Satellite Map links to give you an idea where the earthquake struck, which terrain it happened and if villages or cities are located in the immediate vicinity.
The page is regularly updated to add new quakes.
Minor earthquakes are earthquakes without or with little damage risk.  In most cases these earthquakes have a Magnitude smaller than M 5.0 OR earthquakes with an hypocenter (depth) of more than 100 km OR earthquakes up to M 5.9 with an epicenter far away from populated areas.
The reference for the time zone is UTC (Coordinated Universal Time)

M 5.3      2010/08/11 23:58   Depth 127 km  BOUGAINVILLE REGION, PAPUA NEW GUINEA
M 4.9      2010/08/11 22:53   Depth 35 km      SANTA CRUZ ISLANDS
M 5.5      2010/08/11 19:10  Depth : 33 km  JAVA, INDONESIA
M 5.0      2010-08-11  17:26  Depth 10 km   NORTHEASTERN IRAN
M 4.4      2010/08/11 10:47   Depth 29      Tsagano, GREECE
M 4.9      2010/08/11 09:51   Depth 10      WEST CHILE RISE (deep in the Pacific Ocean)
M 4.3      2010/08/11 09:06   Depth 10 km    SOUTHERN IRAN
M 4.9      2010/08/11 07:22  Depth 543 km   CELEBES SEA, INDONESIA
M 3.9      2010-08-11   05:49  Depth 1 km  Paramythia, GREECE
M 6.0    2010/08/11 03:35   Depth 41 km   VANUATU (aftershock)
M 5.2      2010/08/11 03:29   Depth 35 km   VANUATU (aftershock)
M 4.9      2010/08/11 01:22   Depth 173 km  VANUATU (aftershock)

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.

Vanuatu – M 6.0 – Powerful aftershock near Port-Vila

Earthquake Report comment :
Another 3 aftershocks since midnight UTC.
The most powerful was a Magnitude 6.0 with an epicenter in the same area as the first massive shock of M 7.3.  As the epicenter was 40 km further away from the island of Efate, the impact must have been considerably weaker.
GDACS issued a GREEN earthquake alert for this earthquake. There was NO Tsunami risk involved.

Most important Earthquake Data:
Wednesday, August 11, 2010 at 02:35:20 PM at epicenter
Depth (Hypocenter) : 41 km
Geo-location(s) :
75 km (45 miles) WNW of PORT-VILA, Efate, Vanuatu

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
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.

In memory of the victims of August 11, 19XX – Greece, Iran, Ecuador and Turkey

“In memory of” will highlight deadly earthquakes of the past.
People have forgotten a lot of these human tragedies.
We @ Earthquake Report are hopeful that people in these countries and cities will learn from their history and will make sure that they are building Earthquake Proof houses and that they know what to do when the earth will be shaking again.

M 8.3  11-08-1903  Depth 80 km    Greece – killing 2 people in Southern Greece
No other details have been found

M 6.2  11-08-1904  Depth 10 km    Greece – killing 4 people near Samos Greece
No other details have been found

M 6.0  11-08-1988  Depth 11 km    Iran –   killing 1 person
One person killed, several injured and more than 2,000 houses damaged in the Mamasani area. Felt at Bushehr, Nurabad and Shiraz.

M 5.3  11-08-1990  Depth 18 km    Ecuador – killing 4 people

At least 4 people killed, 10 injured, 1,300 houses damaged and landslides in the Pomasqui area. Felt strongly at Quito.

M 5.6  11-08-2004  Depth 5 km    Turkey – killing 1 person
One person killed, 11 people injured and several houses damaged in the Elazig-Sivrice area.

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