Earth Snapshot RSS Feed Twitter
 
 
 
 

Posts tagged Volcanic field

Volcanic Events in Craters of the Moon National Monument, USA

43.4N 113.5W

June 16th, 2013 Category: Volcanoes MODISTerra

USA – June 15th, 2013

Craters of the Moon National Monument, in Idaho, visible here as an upside-down V-shaped brown area on the right side of the image, is a vast ocean of lava flows with scattered islands of cinder cones and sagebrush. Volcanic events were reported in the area on June 15th, and are expected to continue today.

Between 15,000 and 2,000 years ago, the Craters of the Moon Lava Field formed during eight major eruptive periods. During this time the Craters of the Moon lava field grew to cover 618 square miles. The Wapi and Kings Bowl lava fields formed contemporaneously about 2,200 years ago.

Currently, this region is experiencing basin and range type faulting, which is stretching or pulling apart the crust. The Lost River Range north of the town of Arco provides good evidence that these forces are still active. In 1983 these forces caused a magnitude 6.9 earthquake, during which Mount Borah rose about 1 foot and the Lost River Valley in that vicinity dropped about 8 feet.

On the Eastern Snake River Plain, rather than producing mountain ranges, the tensional forces have caused decompression melting, which results in dike emplacement and periodic eruption of molten rock onto the surface. As long as these forces continue to act, more eruptions will occur.

Jabal al-Druze Volcanic Field in Southern Syria – May 16th, 2010

32.6N 36.7E

May 16th, 2010 Category: Image of the day, Mountains, Volcanoes

Syria - April 28th, 2010

Syria - April 28th, 2010

The Jabal al-Druze volcanic field is an elevated volcanic region in Syria, in the As-Suwayda Governorate. It lies in the Haurun-Druze Plateau in the southwest of the country near the border with Jordan.

This volcanic field also lies within the northern part of the massive alkaline Harrat Ash Shamah (also known as Harrat Ash Shaam) volcanic field that extends from southern Syria to Saudi Arabia. The alkaline volcanic field consists of a group of 118 basaltic volcanoes active from the lower-Pleistocene to the Holocene.

The most prominent feature of this volcanic field is 1800m-high Jabal al-Druze,  also known as Jabal al-Arab (meaning Mountain of the Arabs). It stands out as a dark brown area in the center of the image.

The large southwestern plateau depression is filled by basaltic lava flows from volcanoes aligned in a northwest-southeast direction.

Volcanoes and Volcanic Fields in Eritrea and Djibouti – July 12th, 2009

12.5N 42.5E

July 12th, 2009 Category: Image of the day, Volcanoes

Djibouti and Eritrea - July 2nd, 2009

Djibouti and Eritrea - July 2nd, 2009

The prominent features of this orthorectified ASAR (radar) image of Eritrea and Djibouti include the Mousa Ali Volcano and the Gufa Volcano volcanic field (both in bottom left quadrant) and the Asseb Volcano volcanic field (top right quadrant).

The Mousa Ali Volcano is a stratovolcano located in the Southern Red Sea region on the borders of Eritrea and Djibouti. At 2,028 m (6,654 ft), the volcano is the highest point in Djibouti.

The volcano’s summit is truncated by a caldera, which contains rhyolitic lava domes and lava flows. The last known eruption occurred during the Holocene era.

Northeast of this large volcano is the Gufa Volcano, a volcanic field located in the Southern Red Sea Region of Eritrea near the border with Ethiopia. The peak elevation is 600m, where lava flows are visible. The last eruption of the volcano was inferred to be during the holocene era.

The Asseb Volcano is a volcanic field located in the Southern Red Sea Region of Eritrea. Its peak elevation is 987 m. Like the Mousa Ali Volcano, the most recently identified eruption occurred during the Holocene era.

Waw an Namus Volcanic Field, Libya

24.9N 17.7E

June 8th, 2009 Category: Volcanoes

Libya - May 30th, 2009

Libya - May 30th, 2009

Waw an Namus, meaning Oasis of Mosquitoes, is a volcanic field, cone and caldera in the southern region of Libya, visible here at the center right. It is also near the geographic center of the Sahara Desert.

The inside of the caldera, which appears a lighter color here, houses rich foliage and three small salt lakes of variable color which are the reason for the volcano’s name. An apron of dark basaltic tephra extends 10-20 km around the caldera.

Sahara Desert in Libya and Chad – March 5th, 2009

March 5th, 2009 Category: Image of the day, Volcanoes

Desert in Libya - February 26th, 2009

Desert in Libya - February 26th, 2009

Close-up1

Close-up1

Close-up2

Close-up2

The sands of the Sahara Desert in southern Libya (above), slightly covered by clouds, and northern Chad (below) have different hues, ranging from tan and light yellow to golden orange to red.

Many large dunes can be observed in all the images, although they are most prominent in the second close-up.

The first close-up highlights the dunes near the northern end of a volcanic field in Chad, the Tarso Toh. It is located north of Tarso Toussidé volcano and fills valleys and plains over an area of 80 km in an east-west direction and 20-30 km in north-south direction. The field contains 150 scoria cones and two maars (broad, low-relief volcanic craters caused by a phreatomagmatic eruptions Рexplosions that occur when groundwater comes into contact with hot lava or magma).

About Us

Earth Observation

Organisations

Archive

November 2017
M T W T F S S
« Mar    
 12345
6789101112
13141516171819
20212223242526
27282930  

Categories


Bulletin Board


Featured Posts

Information

45


Take Action

Widgets