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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.

Hurricane Felicia continues moving toward the Hawaiian Islands

19.8N 155.6W

August 9th, 2009 Category: Tropical Storms

Hurricane Felicia - August 8th, 2009

Hurricane Felicia - August 8th, 2009

Enhanced image

Enhanced image

Track of Felicia - August 8th, 2009 © Univ. of Wisconsin

Track of Felicia

Hurricane Felicia continues moving west toward the Hawaiian islands. At 1100pm HST the center of Hurricane Felicia was located about 675 miles East of Hilo Hawaii near 20.3°N 144.7°W.

The system is moving West or 280 degrees at 15 mph. Maximum sustained winds are near 80 mph. The hurricane is currently having no direct effect on weather around the Hawaiian islands.

Hurricane Felicia is forecast to weaken and continue west toward Maui county and the Big Island over the next few days. The forecast track brings Felicia near or over those islands on Monday. Although the system is expected to weaken to a tropical storm as it reaches the islands it will still be capable of producing torrential flooding rains very high surf and damaging winds.

It is too early to provide exact values for wind rainfall and surf at specific locations. People under the watch should begin preparing now. Listen for possible warnings and be ready to evacuate if necessary. Heed the advice of local officials.

In the vicinity of the state, broken areas of cumulus and stratocumulus clouds, moving west at 15 mph, have increased over the windward waters north and east of the main Hawaiian islands in the last six hours. These clouds become overcast about 150 miles east of Hilo and continue towards the western edge of hurricane Felicia.

Animations show isolated light showers over windward waters and along the cloud plumes over water to the west of the islands. Over land, cloud cover is sparse over Kauai, Oahu, Molokai and Lanai and is mainly concentrated over windward and Mauka areas.