Tuesday | November 21, 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: Oct 11 2015 - 1:31am

    Thursday is the third annual Great Hawaii ShakeOut. That day also marks the ninth anniversary of Hawaii’s two most recent damaging earthquakes.

  2. | Posted: Oct 4 2015 - 1:31am

    Hawaii has a long history of destructive earthquakes. More than 30 magnitude-6.0 or greater earthquakes have impacted the islands since 1868 (or about once every five years), and the chance of a damaging earthquake striking Hawaii in the next 10 years is 50 percent.

  3. | Posted: Sep 27 2015 - 1:30am

    Bottled soda, when opened suddenly after shaking, is commonly used as an analogy for volcanic eruptions. Perhaps the first use of this analogy for Hawaiian volcanoes was during the 1899 Mauna Loa eruption, when Sereno Bishop, a missionary with an interest in science, suggested the idea in a letter to the Hawaiian Star newspaper on July 20.

  4. | Posted: Sep 20 2015 - 1:30am

    The U.S. Geological Survey Hawaiian Volcano Observatory changed the Volcano Alert Level and Aviation Color Code for Mauna Loa Volcano from normal/green to advisory/yellow on Thursday. This change reflects HVO’s determination that the volcano is showing persistent signs of low-level unrest. It does not mean, however, that an eruption is imminent or certain.

  5. | Posted: Sep 13 2015 - 1:30am

    During the 1950s, a decade of major change in volcano monitoring, the U.S. Geological Survey’s Hawaiian Volcano Observatory was moving from the mechanical into the electronic age, and staff were needed who could fulfill the requirements of the new technology.

  6. | Posted: Sep 9 2015 - 9:36am

    From “watch” to “warning” and back: Kilauea Volcano’s status changes during past year

  7. | Posted: Aug 30 2015 - 1:30am

    Does lava continue to flow exactly as it did on land or does it behave differently after it enters the ocean?

  8. | Posted: Aug 28 2015 - 3:01pm

    A large breakout early Thursday erupted lava onto the floor of Puu Oo Crater, U.S. Geological Survey Hawaiian Volcano Observatory reports.

  9. | Posted: Aug 23 2015 - 1:30am

    In early 1918, visitors swarmed to Kilauea Volcano to see a splendid show. The molten lake in Halemaumau had been rising and the pit was almost full. Soon lava spilled over the crater rim onto the floor of Kilauea’s summit caldera, destroying part of an automobile road, as well as the visitor viewing area near the rim.

  10. | Posted: Aug 15 2015 - 7:46pm

    As part of our monitoring of subsurface activity at Mauna Loa, we recently conducted a series of measurements of the force of gravity at various locations near the summit caldera and rift zones of the volcano. Did that sentence surprise you? Most of us don’t think much about gravity, but when we do (as in, perhaps, cursing it when our cellphone drops to the ground), we don’t usually think of it as being different from place to place or from time to time.

  11. | Posted: Aug 9 2015 - 1:30am

    For 15 years, we’ve been on a journey of discovery through Kilauea’s volcanic past. Today, we review what’s been learned on that journey and how new findings are shaping our thoughts about the future at Kilauea.

  12. | Posted: Aug 7 2015 - 1:28pm

    The June 27 lava flow remains active within 5 miles of the Puu Oo vent, U.S. Geological Survey Hawaiian Volcano Observatory scientists said Friday.

  13. | Posted: Aug 2 2015 - 1:31am

    In the June 25 Volcano Watch, we described how old maps and newspaper articles provide valuable insights into historic accounts of eruptions. By comparing archival material with current observations of volcanic activity, scientists can gain a better understanding of past events and future possibilities for Hawaiian volcanoes.

  14. | Posted: Jul 31 2015 - 9:25am

    Inflationary tilt continues at Kilauea Volcano’s summit, the U.S. Geological Survey reported Friday morning.

  15. | Posted: Jul 26 2015 - 1:31am

    During the past four months, the June 27 lava flow, named for the date in 2014 that it began erupting from Puu Oo on Kilauea Volcano’s East Rift Zone, has consisted of small surface pahoehoe flows scattered across a broad area within 5 miles of Puu Oo.