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Volcano Watch: Keeping up with Kilauea – West Hawaii Today

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Volcano Watch: Keeping up with Kilauea – West Hawaii Today


Kilauea began erupting from fissures southwest of Kaluapele (the summit caldera) just after midnight on June 3; the eruption ceased just nine hours later, though lava flows continued to slowly spread for several more hours. Prior to the brief eruption, the USGS Hawaiian Volcano Observatory (HVO) had been monitoring pulses of heightened seismic activity in the summit area for weeks.

How did these earthquakes give us insight into the features of the molten magma below and the eruption that was to come?

Earthquakes result from the breaking of cooler, brittle rock. As magma moves into an area, it forces the surrounding rock to bend and then break. This brittle rock “failure” is what seismologists at HVO see daily on live data streams as earthquakes. The locations of earthquakes can outline magma chambers, indicate fault movement, or show where magma is moving into new area. At Kilauea, earthquake swarms paired with changes in ground motion as seen on tiltmeters give HVO scientists an idea of the pressurization of magma chambers beneath the surface.

The proposed magma plumbing system at Kilauea is divided into three main chambers: the Halema‘uma‘u reservoir, the south caldera reservoir, and the Keanakako‘i reservoir. In the weeks leading up to Monday’s eruption, there were three distinct periods of heightened unrest. From April 27-May 3, May 6-9, and May 17-18, two distinct clusters of earthquakes occurred in the south caldera and the upper East Rift Zone (see box 3 in Figure 1).

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During these swarms, earthquake locations often switched between the south caldera cluster and the upper East Rift Zone cluster as magma pressure levels fluctuated within the different storage regions. The event counts at the south caldera cluster increase while the counts at the upper east rift cluster diminish as the system moved closer to eruption. Rates of ground tilt, measured by summit tiltmeters would also increase during the earthquake swarms, indicating an increased pulse of magma was accumulating beneath the surface.

Although the earthquakes occurred in distinct clusters, they could have happened in response to the stresses created by magma chambers located nearby. For this reason, there were several possibilities scenarios. First, magma accumulation could stop, and no eruption would occur. Magma accumulation could continue with an eruption in Kaluapele or magma could migrate to the southwest with either an intrusion (similar to last January) or eruption.

As we now know, magma did indeed migrate to the southwest and this time it erupted.

Just after noon on Sunday, June 2, earthquakes increased again beneath the south caldera region and intensified quickly, prompting HVO to raise the alert level and aviation color code for Kilauea at 5:30 p.m. HST.

For twelve hours, earthquakes of up to M4.1 shook the summit region until 12:30 a.m. Monday morning, when a fissure opened about 1 mile (2 km) southwest of the caldera. The eruption happened in the vicinity of ground cracks that formed in the late January intrusion.

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Past eruptions in this area — in 1971 and 1974 — have been brief, so it was no surprise when the fissure stopped erupting nine hours after the eruption began. Fortunately, the short-lived eruption occurred within a closed area of Hawai Volcanoes National Park; it did no damage to infrastructure. This was the first eruption in this area of Kilauea in 50 years, and the first eruption outside of Kaluapele since 2018. Only about 100 acres were covered with new lava, compared to over 500 during the September 2023 eruption within Kaluapele.

While lava has stopped moving on the surface of Kilauea, volcanic gas emissions remain elevated and activity beneath the surface remains dynamic. HVO scientists will continue to closely monitor for signs of change.

Volcano
activity updates

Kilauea is not erupting. Its USGS Volcano Alert level is ADVISORY.

Kilauea erupted briefly on Monday, June 3, southwest of Kaluapele (Kilauea caldera) within the closed area of Hawaii Volcanoes National Park. Tremor and incandescence associated with the fissure vents are still present but have decreased significantly since June 3. Sulfur dioxide emission rates remain elevated in the upper Southwest Rift Zone eruption area; an emission rate of 400 tonnes per day was measured today, June 6, for the combined areas of Kilauea summit and the recent eruption. Overall seismicity in the summit region including the eruption area remains low, although inflationary ground deformation of the summit continues. Additional pulses of seismicity and deformation could result in new eruptive episodes within the area or elsewhere on the Southwest Rift Zone.

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Mauna Loa is not erupting. Its USGS Volcano Alert Level is at NORMAL.

Webcams show no signs of activity on Mauna Loa. Summit seismicity has remained at low levels over the past month. Ground deformation indicates continuing slow inflation as magma replenishes the reservoir system following the 2022 eruption. SO2 emission rates are at background levels.

Nine earthquakes were reported felt in the Hawaiian Islands during the past week: a M3.5 earthquake 4 km (2 mi) S of Pahala at 30 km (18 mi) depth on June 5 at 4:18 a.m. HST, a M3.1 earthquake 3 km (1 mi) SSW of Pahala at 31 km (19 mi) depth on June 3 at 7:01 a.m. HST, a M4.1 earthquake 7 km (4 mi) SSW of Volcano at 0 km (0 mi) depth on June 2 at 9:12 p.m. HST, a M3.2 earthquake 7 km (4 mi) SW of Volcano at 1 km (1 mi) depth on June 2 at 7:38 p.m. HST, a M4.0 earthquake 7 km (4 mi) SSW of Volcano at 0 km (0 mi) depth on June 2 at 7:06 p.m. HST, a M3.1 earthquake 7 km (4 mi) SSW of Volcano at 0 km (0 mi) depth on June 2 at 6:15 p.m. HST, a M3.4 earthquake 7 km (4 mi) SW of Volcano at 1 km (1 mi) depth on June 2 at 5:15 p.m. HST, a M3.1 earthquake 8 km (4 mi) SW of Volcano at 1 km (0 mi) depth on June 2, 2024 at 4:58 p.m. HST, and a M3.4 earthquake 12 km (7 mi) S of Waikoloa at 35 km (22 mi) depth on June 1 at 7:16 p.m. HST.

HVO continues to closely monitor Kilauea and Mauna Loa.





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Boy dies after being struck by vehicle in Hawaii Kai | Honolulu Star-Advertiser

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Boy dies after being struck by vehicle in Hawaii Kai | Honolulu Star-Advertiser


A boy was killed after being struck by a vehicle today in Hawaii Kai, police said.

At about 11:02 a.m., a 37-year-old woman “was attempting to travel northbound” on Kukuau Place when the vehicle hit a boy who was in the road in front of the vehicle, according to a Honolulu Police Department’s Traffic Division news release. The child was taken to a hospital in critical conition where he was pronounced dead.

The driver remained at the scene and was uninjured, police said.

HPD did not release the boy’s age or say whether speed, drugs or alcohol were possible factors in the collision.

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This was Oahu’s ninth fatality in 2026, compared with 15 at the same time last year.




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Pacific leaders gather in Hawaii for business summit – The Garden Island

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Pacific leaders gather in Hawaii for business summit – The Garden Island






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No. 3 Rainbow Warriors continue winning ways against No. 6 BYU | Honolulu Star-Advertiser

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No. 3 Rainbow Warriors continue winning ways against No. 6 BYU | Honolulu Star-Advertiser


The third-ranked Hawaii men’s volleyball team had no problem recording its 11th sweep of the season, handling No. 6 BYU 25-18, 25-21, 25-16 tonight at Bankoh Arena at Stan Sheriff Center.

A crowd of 6,493 watched the Rainbow Warriors (14-1) roll right through the Cougars (13-4) for their 11th straight win.

Louis Sakanoko put down a match-high 15 kills and Adrien Roure added 11 kills in 18 attempts. Roure has hit .500 or better in three of his past four matches.

Junior Tread Rosenthal had a match-high 32 assists and guided Hawaii to a .446 hitting percentage.

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UH hit .500 in the first set, marking the third time in two matches against BYU it hit .500 or better in a set.

Hawaii has won seven of the past eight meetings against the Cougars (13-4), whose only two losses prior to playing UH were in five sets.

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Hawaii has lost six sets all season, with five of those sets going to deuce.

UH returns to the home court next week for matches Wednesday and Friday against No. 7 Pepperdine.




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