April is Tsunami Awareness Month in the State of Hawaii. As in previous years, groups across the state are conducting exercises and other activities to increase awareness of, and preparedness for, tsunami hazards.
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Every year about this time, we write about the chemistry of lava erupting from Kilauea volcano.
March marks the anniversary of the most recent eruption of Mauna Loa, which began March 25, 1984. It also reminds us of a much more destructive series of events that affected the island — the 16 days of earthquakes in 1868 that included a tsunami, landslide and eruption in Ka‘u.
It’s been 30 years since Mauna Loa — the largest active volcano in the world — last erupted sending within 4.5 miles of Hilo.
- Mauna Loa is the world’s largest active volcano.
Mauna Loa’s eruptive history and current status are the topics of a free talk by Frank Trusdell, U.S. Geological Survey Hawaiian Volcano Observatory geologist, at 7 p.m. Tuesday at Kilauea Visitor Center Auditorium.
The lava flows and volcanic landscapes along Mamalahoa and Queen Kaahumanu highways, from Ka‘u to North Kona, will be the focus of a public talk offered by U.S. Geological Survey Hawaiian Volcano Observatory scientists at 5:30 p.m. Wednesday, April 2, at the Ocean View Community Center.
Mauna Loa, the world’s largest active volcano, has erupted many times — most recently three decades ago with lava coming within just miles of Hilo — and it will erupt again, posing a significant risk to those who call Hawaii Island home, a Hawaii Volcano Observatory geologist said Jan. 8.
More than 100 people spent the evening of Jan. 22 learning the history, stories and impacts of volcanic features from Ka‘u to North Kona. Vehicles filled the parking lot outside of the Natural Energy Laboratory of Hawaii Authority’s Gateway Visitor Center and even lined the entrance road. Meanwhile, a standing-room-only crowd packed the center.
The Hawaiian Volcano Observatory is one of five volcano observatories within the U.S. Geological Survey and is responsible for monitoring volcanoes and earthquakes in Hawaii.
March 25 is the 30th anniversary of the most recent eruption of Mauna Loa, Hawaii Island’s largest volcano. According to historical records, Mauna Loa has erupted 33 times since 1843, an average rate of one eruption every five years. When we look at the past 3,000 years of Mauna Loa’s eruptive history, we see it has erupted about once every six years.
Six years is a blink of an eye in geologic time, but it can fly by for people, too. In a way, it doesn’t seem very long ago that the summit eruption began, with a small explosion that threw blocks around the Halemaumau Crater rim. On the other hand, so much has happened at the new vent that it is getting harder to remember what it was like when Kilauea Caldera was open to traffic and Halemaumau was quiet.
March 5, 2014, marked the third anniversary of the onset of Kilauea Volcano’s four-day-long Kamoamoa fissure eruption. This brief episode marked the end of the eruptive vent established east of Puu Oo in 2007 and presaged a return of activity to Puu Oo that continues today.
Soon after a large earthquake occurs, the U.S. Geological Survey’s Hawaiian Volcano Observatory publicizes the preliminary location and magnitude. Have you ever wondered why the location and magnitude of the event sometimes change? Or why it may take awhile to provide the final “reviewed” earthquake report on our website?
Ask a child to draw a volcano, and he or she will likely sketch a cone-shaped mountain erupting lava high into the air — with possibly a dinosaur or two thrown in for good measure. An older child might include a red blob under the mountain representing the volcano’s magma chamber. This child may be on his or her way to becoming a volcanologist. One of the most fundamental questions of volcanology today is: “How big is that red blob under the mountain?”