News

Volcano Watchers may pride themselves on having witnessed a variety of lava flows, but how many can say they've seen flowing molten sulfur? It happens...

April 2010 marks the 70th anniversary of Mauna Loa's third longest summit eruption in recorded history. The 134-day-long eruption in 1940 has been...

Views of Mauna Loa's Southwest and Northeast Rift Zones.
 

We often hear the term "IQ" (intelligence quotient)—but how would you rate your "VAQ" (volcano awareness quotient)? In other words, how well do you...

"Pahala Ash," named for the town of Pahala, refers to soil deposits along the southeast portion of the island of Hawai`i. Pahala Ash was described by...

Aerial views of Mauna Loa and neighboring volcanoes.
 

The HVO Web site was recently revamped to make access to our increasing number of Webcams easier for viewers and the HVO staff who post Webcam images...

On the afternoon of January 6, 1949, scientists at the Hawaiian Volcano Observatory, 32 km (20 miles) from Mauna Loa's summit, couldn't see the top of...

If you see someone alongside the road next to a white disk-shaped antenna atop a yellow tripod, it could be a U.S. Geological Survey Hawaiian Volcano...

This past Wednesday marked the silver anniversary of Mauna Loa's most recent eruption.