Volcano Watch

Every year about this time, the HVO staff asks the question: Will the volcano behave over the holidays? Given the amount of volcanic and seismic...

A "Volcano Watch" article several months ago provided an overview of the recently installed current earthquakes web pages at the Hawaiian Volcano...

Everybody is familiar with ocean tides that cause the ocean level to go up and down, usually twice a day. We can go down to the beach and watch this...

Most people know that volcanoes formed the Hawaiian island chain. Few realize, however, that the chain consists of two or more strands of volcanoes...

Over the past several weeks, visitors to Kīlauea have been treated to views of spectacular surface lava flows cascading down the pali and a new ocean...

Of the more than 30 eruptions of Mauna Loa in the last hundred years, the 1975 and 1984 eruptions are the first events for which we have detailed...

Volcanologists have long known that when molten rock rises to within 2-10 km (1-6 miles) of the Earth's surface, the overlying ground is often pushed...

"Volcano Watch" often responds to a question from an interested citizen. A resident of Makawao, Maui, asked about the stability of Kīlauea and whether...

A few days before the long Labor Day weekend, Hawai'i County officials closed the newly opened Lava Viewing road because a surface lava flow was...

Forty years ago, at 12:36 p.m. on September 21, a swarm of large, shallow earthquakes accompanied by strong harmonic tremor began to emanate from the...