Volcano Watch

Molten lava flows downhill. This simple fact has spurred many residents on the Island of Hawai‘i, where Kīlauea Volcano has been erupting for more...

Petrology is literally the "study of rocks," and looking carefully at the rocks coming out of a volcano is necessary in order to understand what's...

On May 21, 2010, Kīlauea Volcano's ongoing eruption reached a milestone:
10,000 days!

At HVO's Monday meeting, geologist Tim Orr updated the staff on current eruption conditions at Kīlauea's summit, east rift zone vents and flow field.

An Icelandic volcano was prominently featured in March and April's news, first for its gentle, tourist-friendly eruptions, and later for its...

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...

Regular visitors to HVO's daily update Web page might notice what seems like a minor change in one of Kīlauea two ongoing eruptions. While sulfur...

Wednesday, April 14, 2010, 7:37 a.m., Hawaii Standard Time: "Uh. Oh, oh. Did you feel that? It felt like an earthquake."

All of us lose something as we age, and, about 500 years ago, Kīlauea lost its top. The summit collapsed to form a precipitous hole, known as a...

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...