Thursday | November 23, 2017
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Drive along Saddle Road reveals outstanding volcanic geology

| | Nov 19 2017 - 8:43pm | Comments

Route 200, the Daniel K. Inouye Highway, crosses Humuula Saddle, which separates Mauna Kea and Mauna Loa, the two largest volcanoes on Hawaii Island. This Saddle showcases outstanding volcanic geology and is easy to reach for “roadside geologists.”

  1. | Posted: Jun 28 2016 - 9:28am

    Kiluaea Volcano’s Puu Oo vent continues to feed the latest lava flow advancing toward Pulama pali on Monday.

  2. | Posted: Jun 25 2016 - 9:38pm

    In 1823, the party of English Rev. William Ellis (1794-1872), including American missionary Asa Thurston and a number of local guides, explored the wild landscape of Kilauea Volcano. Ellis returned with his ailing wife to a family home in London where, in 1824, he began writing a detailed narrative of his journey around the Hawaii Island. No other Caucasian visitors had published descriptions of this landscape, and one could say that the “history” of Ka‘u and, more broadly, of Kilauea, in the sense of contemporary written documentation, begins with Ellis.

  3. | Posted: Jun 18 2016 - 9:40pm

    Early May 24, USGS Hawaiian Volcano Observatory scientists were alerted by text message that a tiltmeter on the Puu Oo cone on Kilauea Volcano’s East Rift Zone had detected rapid change. Soon after, an HVO field crew reported that lava had broken out from the flanks of Puu Oo. Tiltmeter data showed that the breakout likely began at 6:50 a.m.,resulting in a rapid deflation of the cone as magma burst forth from new vents.

  4. | Posted: Jun 15 2016 - 10:29am

    The lava flow that menaced Pahoa and the rest of lower Puna has come to an end.

  5. | Posted: Jun 13 2016 - 9:54am

    During the past 148 years, Mauna Loa Southwest Rift Zone eruptions have sent massive lava flows across Hawaii Island’s main road six times: in 1868, 1887, 1907, 1919, 1926, and 1950. These flows destroyed villages, displacing residents; burned forests and ranch land, trapping cattle on isolated knolls; blocked roads, disrupting traffic; and torched telephone poles, severing communication.

  6. | Posted: Jun 6 2016 - 8:40am

    In his popular single “Volcano,” Jimmy Buffett sings, “I don’t know where I’m a gonna go when the volcano blow.” His lyrics referred to Soufrière Hills, a then-dormant volcano on the island of Montserrat in the West Indies, where he recorded the song in 1979. Sixteen years later, the volcano erupted for the first time in over 400 years.

  7. | Posted: May 29 2016 - 12:05am

    Today’s Volcano Watch is courtesy of our U.S. Geological Survey colleagues at the Pacific Island Ecosystems Research Center, which focuses on Hawaii’s biodiversity.

  8. | Posted: May 26 2016 - 8:59am

    More than 31 years after Mauna Loa last erupted, sending lava within 4.5 miles of Hilo, the largest active volcano in the world is showing signs of unrest.

  9. Posted: May 26 2016 - 8:43am

    The Hawaiian Volcano Observatory says two new lava flows on Kilauea’s Pu‘u ‘O‘o cone have made little progress since they erupted Tuesday morning.

  10. | Posted: May 25 2016 - 12:01pm

    Lava began flowing in two directions from Kilauea’s Pu‘u ‘O‘o cone Tuesday morning.

  11. | Posted: May 22 2016 - 12:30am

    In September 2015, the USGS Hawaiian Volcano Observatory (HVO) raised the Volcano Alert Level for Mauna Loa from “normal” to “advisory” because of increased activity beneath the mountain’s summit caldera and upper Southwest Rift Zone (SWRZ). Importantly, the “advisory” level does not indicate that an eruption is imminent or certain. Rather, it means that one or more monitoring data streams are recording activity significantly above background levels. At the same time that earthquake rates increased, sensitive Global Positioning Satellite (GPS) instruments and satellite radar systems (InSAR) recorded ground swelling, which indicated that magma was moving into shallow levels beneath the volcano (a process called “inflation”).

  12. | Posted: May 17 2016 - 10:06am

    In our January 2005 Volcano Watch article, titled “First Photograph of Kilauea Volcano in the 60s,” we featured an old print found in the USGS Hawaiian Volcano Observatory (HVO) photo archives. Written on the back of it was the notation, “First view of volcano in the 60s.”

  13. | Posted: May 2 2016 - 9:12am

    The Island of Hawaii has recently lived up to its worldwide reputation as a beautiful and dynamic place that is frequently vulnerable to many natural hazards. These include hurricanes, earthquakes, tsunamis, floods, and wildfires, as well as eruptions that can send lava flows through communities and create widespread volcanic air pollution.

  14. | Posted: Apr 25 2016 - 10:48am

    Happy birthday to the Hawaii Island geologic map!

  15. | Posted: Apr 18 2016 - 11:22am

    Each year, Hawaii County residents likely feel dozens of earthquakes. They might readily agree that earthquakes are indeed part of living on the Island of Hawaii. But residents across the State of Hawaii, recently nudged by three small earthquakes, were gently reminded that they, too, live with earthquakes.