Sunday | November 19, 2017
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Magma: What’s hot and what’s not

| | Nov 9 2017 - 3:40pm | Comments

Scientists at the U.S. Geological Survey’s Hawaiian Volcano Observatory routinely collect lava samples from Kilauea and use the chemistry of these samples to infer the temperature of magma (molten rock below Earth’s surface).

  1. | Posted: May 31 2017 - 8:21am

    In 1998, a U.S. first-class postage stamp cost 32 cents and a gallon of gas in Hawaii set you back about $1.50. Apple unveiled the iMac, Google was founded, and Pokemon was released in the U.S. for Nintendo Game Boy.

  2. | Posted: May 27 2017 - 10:54pm

    Eruptions are not the only hazard created by volcanoes. They can create havoc millions of years after their fires have grown cold, because with time, their deposits can weaken to produce landslides. This happens because volcanic deposits are commonly rich in volcanic glass, a non-crystalline form of silica. In wet climates, this glass can readily transform into soft, weak minerals (primarily clay) through chemical weathering.

  3. | Posted: May 25 2017 - 9:44am

    The lava delta at Kilauea Volcano’s Kamokuna ocean entry continues to grow.

  4. | Posted: May 16 2017 - 10:50am

    Editor’s note: This week’s Volcano Watch was written by USGS Hawaiian Volcano Observatory geologist Don Swanson, who worked on Mount St. Helens before and after the 1980 eruption.

  5. | Posted: May 6 2017 - 6:26pm

    Seismology is often thought of as “earthquake science” because earthquakes — while not the only cause — are the most prolific producers of seisms, or earth shaking. The largest earthquakes ever recorded release many thousands of times more energy than the largest man-made explosions.

  6. | Posted: Apr 29 2017 - 8:23pm

    On June 13, 1950, Honolulu was suddenly blanketed by the thickest haze seen since recordkeeping began there in 1906. Interestingly, the haze was first noticed four days earlier at Johnston Island, 800 miles southwest of Oahu, and then on June 12 at Wake Island, 1,500 miles west-southwest. The total area covered by the dense haze layer was estimated to be 1.2 million square miles.

  7. | Posted: Apr 15 2017 - 8:37pm

    An estimated 1,500 visitors a day hike across the lava flow fields to view the ocean entry and search for active lava breakouts. Round-trip walking distance is far; a one-way trip to the ocean entry from Kalapana is around 4 miles. Add the chase for active lava, milling about, and your hike will quickly add up to more than 10 miles when you return.

  8. | Posted: Apr 11 2017 - 9:08am

    Hawaiian Volcano Observatory (HVO) staff, alumni and friends recently gathered to honor the long and fruitful career of Jeff Sutton, our recently retired colleague.

  9. | Posted: Apr 2 2017 - 12:05am

    Hawaii is not the only island in the United States with an ongoing eruption involving hot lava and cold water.

  10. | Posted: Mar 28 2017 - 9:59am

    Around Pahala are several ash layers composed of fine-grained volcanic deposits, generally called “soil.” The ashes are a mixture of altered glass, rare vitric (glassy) shards, Pele’s hair, pumice, and olivine crystals. They are derived from pristine ash-fall deposits, weathered and reworked ash, and sediments. Ancient soil horizons are present in some localities.

  11. | Posted: Mar 18 2017 - 5:46pm

    Kilauea Volcano’s summit eruption in Halemaumau Crater began in March 2008. Since that time, countless changes have occurred. The crater enclosing the lava lake (called the Overlook crater) has enlarged through rockfalls, and explosions have thrown spatter around the crater and onto the rim of Halemaumau itself. The lava-lake level has fluctuated, leading to several overflows of lava onto the Halemaumau Crater floor.

  12. | Posted: Mar 18 2017 - 11:43am

    A fire hose of lava continues to pour into the sea at the Kamokuna ocean entry, the U.S. Geological Survey Hawaiian Volcano Observatory reports.

  13. | Posted: Mar 11 2017 - 7:17pm

    Since its initiation on July 26, 2016, the Kamokuna ocean entry has drawn thousands of visitors eager to witness the creation of new land. The interaction of hot lava and cold seawater produces beautiful and powerful displays that can only be observed on Hawaii Island.

  14. | Posted: Mar 9 2017 - 9:12pm

    HILO — National Park Service officials are again pleading with visitors to heed safety warnings.

  15. | Posted: Mar 4 2017 - 8:04pm

    This is the story of how a new concept — slowly pulsing magma supply to Kilauea — emerged from observations of the Overlook lava lake in Halemaumau.