Volcano Watch

The adage "a picture is worth a thousand words" is certainly true, especially when it comes to photographs of Hawaiian eruptions and volcanic...

The key to unlocking the geologic secrets of a volcano's future is its past. The further back we can peer into the past & delve into Pele's secrets...

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...

Two weeks ago, readers of this column learned about the genesis of brown plumes and sudden gas release from Kīlauea's summit vent. This week we will...

Just before daybreak on May 24, 1969, a new eruptive fissure split open Kīlauea's east rift zone at its bend near `Alo`i Crater. During the previous 9...

This weekend marks the return to the Big Island of ukulele virtuoso Jake Shimabukuro. His shows encompass a musical variety from Hawaiian to bluegrass...

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...

How do you know when a volcano is exploding? Just look at it? Seems like the obvious answer. This works if there are some eyes aimed at the volcano in...

During the past two weeks, two noteworthy earthquakes struck Kīlauea Volcanos south flank.

Life in Goma—a city of about half a million on the eastern border of the Democratic Republic of the Congo—has been particularly difficult over the...

Unless you've been sitting in a lava cave (the way we sometimes do) you should be well aware that this Sunday is the beginning of the annual Merrie...

The current eruption at Kīlauea's summit is unique in the recorded history of the volcano. Never in the past 200 years has there been a long-lived...

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

When strong volcanic tremor (continuous shaking of the ground) was recorded beneath Redoubt volcano January 23 to 25, scientists of the Alaska Volcano...

It seems like only yesterday when the Hawaiian Volcano Observatory (HVO) monitored a several-week build-up in seismic tremor levels and sulfur dioxide...

As noted in Volcano Watch a few weeks ago, this month marks the 25th anniversary of Mauna Loa's most recent eruption—a 22-day event that began on...

The Island of Hawai`i, a composite of five volcanoes, has a surface area almost twice as large as the other main Hawaiian Islands combined.

When an earthquake occurs, why do we feel the ground shake? The shaking we feel is from seismic waves radiating away from the earthquake. These waves...

March 25 marks the 25th anniversary of the most recent eruption of Mauna Loa volcano.

In most sciences, processes are investigated by identifying the factors that affect them and varying each factor, in turn, to determine its...