Volcano Watch

The staff of the USGS Hawaiian Volcano Observatory (HVO) sends a big "mahalo" to everyone who attended our public presentations during Hawai‘i Island...

We conclude our Volcano Awareness Month series on the important questions about how Hawaiian volcanoes work with an article on monitoring volcanic...

In our January Volcano Watch articles during Hawai‘i Island's 5th annual Volcano Awareness Month, we are exploring important questions about how...

In this second of four Volcano Watch articles addressing the "big" questions faced by volcanologists studying Hawaiian volcanoes today, we will focus...

Welcome to Hawai‘i Island's 5th annual Volcano Awareness Month!

On January 3, 2014, Kīlauea's Pu‘u ‘Ō‘ō eruption surpasses 31 years of activity. The ongoing eruption has evolved tremendously during its complex...

During the course of an eruption, a volcano can produce a variety of hazards, such as lava flows, pyroclastic flows, and lahars (volcanic mudflows)...

The gas emissions from Kīlaueaa volcano have been variable within a fairly steady range for the past few years; however, the numbers that we use to...

During the past year, the USGS Hawaiian Volcano Observatory (HVO), like other federal agencies, dealt with the challenges of budget cuts...

Last week we showed that Kīlauea has explosive eruptions that can carry volcanic ash (less than 2 mm or 0.08 in across) and small lapilli (2–64 mm or...