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Volcanoes of Hawaii: Mauna Kea, Mauna Loa and Hualālai – December 14th, 2009

19.8N 155.6W

December 14th, 2009 Category: Image of the day, Volcanoes

USA - December 1st, 2009

USA - December 1st, 2009

The island of Hawaii is home to five volcanoes, three of which can be observed here in this orthorectified image. These are, clockwise from the upper right, Mauna Kea, Mauna Loa and Hualālai.

Mauna Kea is a dormant volcano in the post-shield stage of volcanic evolution. Its peak is 13,803 feet (4,207 m) above sea level but 33,476 feet (10,203 m) above its base on the floor of the Pacific Ocean, making it the world’s tallest mountain by this measure. The rounded formations on its flanks are various cinder cones.

Mauna Loa is an active shield volcano, with a volume estimated at approximately 18,000 cubic miles (75,000 km³). Its peak, with an elevation of 13,679 feet (4,169 m), is about 120 feet lower than that of Mauna Kea.

Hualālai is a dormant shield volcano with a peak at 8,271 feet (2,521 m) above sea level, much lower than those of Mauna Kea and Mauna Loa. Although Hualālai is not nearly as active as nearby Mauna Loa, geologic mapping of the volcano shows that 80 percent of Hualālai’s surface is covered by lava flows no older than about 5,000 years.

Hualālai and Mauna Loa Volcanoes, Hawaii USA

19.6N 155.8W

August 10th, 2009 Category: Volcanoes

Hawaii, USA - July 11th, 2009

Hawaii, USA - July 11th, 2009

The Island of Hawaii is built from five separate shield volcanoes that erupted somewhat sequentially, one overlapping the other. From oldest to youngest these are: Kohala, Mauna Kea, Hualālai, Mauna Loa and Kīlauea.

Two of these can be observed in this orthorectified image: Mauna Loa, the prominent volcano visible towards the center of the island, and Hualālai, near the top by the island’s coast.

Hualālai is a dormant shield volcano on the island of Hawaiʻi in the Hawaiian Islands. Its peak is 8,271 ft (2,521 m) above sea level. It lies roughly due west of the saddle between the much higher volcanoes Mauna Kea and Mauna Loa.

Much of the southern slope (above the town of Kailua-Kona) consists of lava flows covered by a layer of volcanic ash from 10 cm (a few inches) to a meter (3 ft) thick.

Hualālai is built from a well-defined rift zone that trends approximately N50°W across its summit and a less well-defined rift zone that trends northward from a point 3 mi east of the summit. Over 100 cinder and spatter cones are arranged along the rift zones. There is no summit caldera, just a collapse crater (about 0.3 mile across) at the top of a small lava shield.

Snow-capped Mauna Loa Volcano, Hawaii – February 4th, 2009

February 4th, 2009 Category: Volcanoes

Hawaii - January 27th, 2009

Hawaii - January 27th, 2009

The Mauna Loa (below) and Mauna Kea (above) volcanoes, on the island of Hawaii, are capped with snow.

Mauna Loa is the largest volcano on earth and one of five volcanoes that form the Island of Hawaii, part of the Hawaiian Islands chain, in the Pacific Ocean.

It is an active shield volcano, with a volume estimated at approximately 18,000 cubic miles (75,000 km³), although its peak is about 120 ft lower than that of its neighbor, Mauna Kea.

Although cold temperatures and snow may not come to mind when most people think about Hawaii, both Mauna Kea and Mauna Loa are high enough to permit snowfall during the winter. The snow can even accumulate to a depth of a few meters.

source Wikipedia

Mount Teide Volcano on Tenerife, Canary Islands – January 20th, 2012

28.2N 16.6W

January 20th, 2012 Category: Image of the day, Volcanoes

Tenerife - January 9th, 2012

This orthorectified image shows Tenerife, the largest and most populous island of the seven Canary Islands. It is a rugged and volcanic island sculpted by successive eruptions throughout its history. Tenerife is the largest island of the Canary Islands archipelago, with a surface area of 2,034.38 km2 (785 sq mi) and the longest coastline amounting to 342 km (213 mi).

In addition, the highest point, the volcano Mount Teide, with an elevation of 3,718 m (12,198 ft) above sea level is the highest point in all of Spain. It is the third highest volcano in the world measured from its base on the ocean floor, after Mauna Loa and Mauna Kea located in Hawaii.

Five Volcanoes of Hawaii’s Big Island

21.1N 157.2W

February 16th, 2010 Category: Volcanoes

USA - January 25th, 2010

USA - January 25th, 2010

The Island of Hawaii, also known as the “Big Island” in order to distinguish it from the state, is built from five separate shield volcanoes that erupted somewhat sequentially, one overlapping the other.

These are (from oldest to youngest): Kohala (extinct), Mauna Kea (dormant), Hualālai (active but not currently erupting), Mauna Loa (active), and Kīlauea (active: an eruption began in 1983 and as of 2010 has grown in size).

All five can be observed upon opening the full version of this orthorectified image: (clockwise from top) Kohala, Mauna Kea, Kilauea and Hualalai, with Mauna Loa in the center.

Because Mauna Loa and Kīlauea are active volcanoes, the “Big Island” of Hawaiʻi is still growing bigger. Between January 1983 and September 2002, lava flows added 543 acres (220 ha) to the island.

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