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Friday, July 28, 2023

Kaʻū News Briefs, Friday, July 28, 2023

Experience Volcano This Weekend
Experience Volcano Festival begins early Saturday 7 a.m. with Volcano's 'Ohi'a Lehua Runs for keiki to adults, all starting and finishing at Volcano School of the Arts & Sciences, followed by music, hula, arts, crafts, presentations and dining events throughout Volcano for the next two days. See Festival schedules below.  Photo from Experience Volcano Hawai'i

FOUR NĒNĒ WERE KILLED ON HWY 11 NEAR THE ENTRANCE TO PĀHALA recently, according to word on the street in the village. The story is that the nēnē nested on the grounds of Kaʻū
 Hospital, and that the mother, father and two offspring were run over and killed on the adjacent highway. 
National Park Service Photo
     Nēnē is the Hawaiian goose and state bird, a threatened species under the Endangered Species Act.
     Hawai'i Volcanoes National Park issued a message on Friday. "Slow down for nēnē! These beloved and rare Hawaiian geese are on the move, so let's be extra cautious....."                  Regarding nēnē in the National Park, the message said, "Keep your eyes peeled as many nēnē are spotted on roads and in parking lots.
Together, let's ensure the survival of these beautiful geese by giving them a brake!"
     The rangers also recommended "no feeding allowed, as it could lead to risky associations with people and cars. Let's show some respect to our nēnē friends and cherish their presence in the park!"

THE PARENT ORGANIZATION FOR KAʻŪ HOSPITAL, Hawaiʻi Health Systems Corp., has entered into extended contract negotiations with Kaiser Permanente to provide hospital services for Kaiser Commercial, Medicare Advantage, and QUEST Integration members. The present contract was scheduled to end on Dec. 31, 2022, but has been extended several times through Aug. 15, 2023.
    The statement from HHSC says the organization "is hopeful that an agreement with Kaiser can be reached prior to the expiration of the current extension."
    HHSC facilities and associated clinics affected by the expiring Kaiser contract are located on Hawaʻi Island, O'ahu and Kauaʻi. On this island, they are Kaʻū Hospital, Hilo Medical Center, Hale Ho'ola Hamaku, Kohala Hospital and Kona Community Hospital. On Kaua'i they are Kaua'i Veterans Memorial Hospital and Samuel Mahelona Memorial Hospital. On Oʻahu they are Le'ahi Hospital and Maluhia.
    The statement says, "HHSC is a public hospital system supported by state funds to assure Hawaiʻi's diverse communities receive essential healthcare services."

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MONITORING KILAUEA WITH OCEAN NOISE is the subject of this week's Volcano Watch, written by scientists and affiliates of USGS Hawaiian Volcano Observatory:
    Ocean swells are constantly occurring across the Earth's oceans. These swells interact with the ocean crust below, creating continuous ocean noise that travels all over the Earth, including through our active
volcanoes here in Hawai'i. Because ocean noise signals are always being generated, scientists can use these seismic sources to identify small changes occurring in the Earth's crust over time.
    In climates that experience all four seasons, scientists have shown that ocean noise travels through these regions faster in times when snowpack is present and slower in times when the snow has melted. This winter speedup is due to the overlying snowpack compressing the subsurface and closing any fractures below it.
    When the snow thaws, the subsurface is no longer compressed, the fractures open again, and the snow melt percolates into these fracture systems. This causes ocean noise to travel through these regions more slowly in the spring and summer months. Similarly, in climates that experience excessive rainfall, such as Hawai'i, such precipitation diffuses into the ground, opening fractures and cracks, and causing slowdowns in ocean noise propagation speeds.
    Magma moving under active volcanoes can cause similar opening and closing of fracture systems resulting in changes in the velocity at which ocean noise signals travel through a volcano. Scientists at the Hawaiian Volcano Observatory are developing new techniques that utilize such velocity changes to understand what is happening beneath the surface of volcanoes on the Island of Hawaiʻi.
    The figure shown below indicates changes in the velocity of ocean noise traveling through the summit region of Kīlauea volcano several months before, and in the month after, the start of the summit eruption in December 2020.
    From September to mid-October 2020, the velocity of ocean noise in Kīlauea summit region remained fairly constant. However, by mid-October 2020, velocities in the summit region began to decrease rapidly. When magma migrates beneath the surface, it opens cracks and fractures in the region immediately above it. The opening of these fracture systems, as well as the influx of the magma itself, causes a slowdown in the propagation speed of ocean noise signals through that region.
Scientists at the Hawaiian Volcano Observatory have concluded that magma began to move from deeper depths beneath Kīlauea summit by mid-October 2020. By early December 2020, velocities began to decrease at a more dramatic rate suggesting a more rapid inflow of magma into Kīlauea summit. At that point, earthquake and ground deformation patterns beneath the summit indicated that a small intrusion of magma had occurred.
The figure shows changes in the propagation speed of ocean noise signals (red filled circles) through Kīlauea volcano from September 2020–February 2021. Positive values indicate a speedup in the propagation speed of ocean noise while negative values indicate a velocity slowdown. The black bar around each red circle indicates the uncertainty in the relative velocity change measurement. USGS image

    By mid-December 2020, the velocity of ocean noise traveling through Kīlauea's summit decreased even more, indicating the continued invasion of magma into the volcano.
Finally, on December 20, 2020, at approximately 9:30 p.m. HST, the eruption at Kīlauea's summit began. Following the onset of this eruption, as seen in the figure, a dramatic increase in the propagation speed of ocean noise signals through the summit region was observed. As magma was removed from the shallow storage reservoir, by the outpouring of lava, the region above it deflated. This deflation causes the closure of fractures within the shallow summit, and a resulting increase in the velocity of ocean noise through the summit.
This example demonstrates how monitoring for changes in ocean noise velocity could potentially be used to aid in forecasting volcanic activity. Hawaiian Volcano Observatory scientists are working to better understand this process and apply it as a real-time monitoring tool at both Kīlauea and Mauna Loa volcanoes.
There is no active lava at Halema'uma'u but it still emits about 106 tonnes per day of sulphur dioxide. USGS photo

Volcano Activity Updates
    Kīlauea is not erupting. Its USGS Volcano Alert level is ADVISORY.
    Active lava has not been visible within Halemaʻumaʻu crater at the summit of Kīlauea since June 19.          Earthquake activity in the summit region increased slightly over the past week. Summit tiltmeters generally showed gradual inflation for much of the past week. A sulfur dioxide (SO2) emission rate of approximately 106 tonnes per day was measured on July 26.
    Mauna Loa is not erupting. Its USGS Volcano Alert Level is at NORMAL.
    Webcams show no signs of activity on Mauna Loa. Seismicity remains low. Summit ground deformation rates indicate slow inflation as magma replenishes the reservoir system following the recent eruption. SO2 emission rates are at background levels.
    No felt earthquakes were reported in the Hawaiian Islands during the past week.
    HVO continues to closely monitor Kīlauea and Mauna Loa.

To read comments, add your own, and like this story, see facebook.com/kaucalendar.See latest print edition at kaucalendar.com, in the mail and on stands.

To read comments, add your own, and like this story, see facebook.com/kaucalendar. See latest print edition at kaucalendar.com, in the mail and on stands.

Five thousand in the mail, 2,500 on the street.
See the July edition of The Kaʻū Calendar Newspaper