Tag Archive | "hvo"

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Volcano Watch: Kilauea activity update for April 25, 2019

Posted on 2:52 pm, Thursday, April 25, 2019. Tags: , , , , , , ,

Kῑlauea Volcano is not erupting and its USGS Volcano Alert level remains at NORMAL.

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This image is from a temporary monitoring camera on the west rim of Kilauea Caldera. The camera is looking E towards the bottom of the newly enlarged Halemaʻumaʻu crater, although the deepest part of the crater is not visible from this vantage point. The crater from left to right (roughly NNE to SSW) is approximately 1 km (0.6 mi) across. The depth of the crater in the visible image from the rim is several hundred meters.

Volcano Watch: Kilauea activity update for April 18, 2019

Posted on 11:16 pm, Thursday, April 18, 2019. Tags: , , , , , , ,

Kῑlauea Volcano is not erupting and its USGS Volcano Alert level remains at NORMAL.

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Location of the 5.3 magnitude earthquake at 5:09 p.m. HST, Saturday, April 13, 2019.

Hawaiian Volcano Observatory records 5.3M quake and aftershocks in Kona Saturday (April 13)

Posted on 6:59 pm, Saturday, April 13, 2019. Tags: , , ,

Three aftershocks were recorded within an hour of the earthquake, including a magnitude-3.0 event approximately 11 minutes following the mainshock. Additional aftershocks are expected.

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A high-precision GPS unit (on white “T” in foreground) records its position at a ground control point along Pohoiki Road. This marker was painted in July 2018 and is visible in numerous aerial photographs taken by Hawaiian Volcano Observatory geologists throughout Kīlauea’s lower East Rift Zone eruption last summer. GPS data are recorded over a period of four minutes at each location, enabling vertical precision of approximately 18 cm (7 in). USGS photo by M. Zoeller, 03/22/2019.

Volcano Watch: Recent ground control survey helps finalize USGS lava thickness map

Posted on 1:32 pm, Thursday, April 11, 2019. Tags: ,

Some lava thicknesses on the preliminary map were slightly overestimated, while others were underestimated.

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A closer view of a gravity reading at a station located in the south part of Kīlauea caldera. When repeated over time, gravity measurements can detect changes in subsurface mass that might not be detectable by other monitoring methods. Scientists track this data because the changes could be related to magma movement within the volcano. USGS photo by M. Poland, 03/20/2019.

Volcano Watch: Kilauea activity update for April 4, 2019

Posted on 8:12 pm, Thursday, April 4, 2019. Tags: , , , , , , ,

Rates of seismicity, deformation, and gas release have not changed significantly over the past week.

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Senator Mazie K. Hirono questions Interior Secretary Nominee David Bernhardt about the future home of Hawaiian Volcano Observatory.

Senator Hirono questions decision to relocate Hawaiian Volcano Observatory to Oahu

Posted on 4:36 pm, Thursday, March 28, 2019. Tags: , ,

Moving Hawaiian Volcano Observatory to Oahu “Doesn’t Seem to Make a Lot of Sense”

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This image is from a temporary monitoring camera on the west rim of Kilauea Caldera. The camera is looking East towards the bottom of the newly enlarged Halemaʻumaʻu crater, although the deepest part of the crater is not visible from this vantage point. The crater from left to right (roughly NNE to SSW) is approximately 1 km (0.6 mi) across. The depth of the crater in the visible image from the rim is several hundred meters. Image courtesy of USGS/HVO Webcam

Volcano Watch: Kilauea activity update for March 28, 2019

Posted on 12:31 pm, Thursday, March 28, 2019. Tags: , , , , , , ,

Kīlauea is not erupting. Rates of seismicity, deformation, and gas release have not changed significantly over the past week.

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This aerial view of the western part of Kīlauea Volcano’s caldera was taken on August 6, 2018. The down-dropped block is faulted about 120 m (400 feet) below the caldera floor. Many 19th-century lava flows are exposed in the fault scarps. Halema‘uma‘u (not visible) is to the left of this photo. USGS photo by D.Swanson.

Volcano Watch: New outcrops make good geology

Posted on 11:28 am, Thursday, March 28, 2019. Tags: ,

As Halemaʻumaʻu sank and widened, its crater wall began to expose lava flows that formed during earlier eruptions and were covered by later flows.

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After magma drained from Pu‘u ‘Ō‘ō on April 30, 2018, the crater was roughly 356 m (1168 ft) deep, with the upper part of the crater flared and the deeper part a narrower cylindrical shaft. Collapses on the crater walls have since enlarged sections of the crater and filled the deepest part with rockfall debris, creating a much different crater geometry—as shown in this comparison of models from May 11, 2018, and March 18, 2019. Today, the deepest portion of the crater is 286 m (938 ft).

Volcano Watch: Kilauea activity update for March 22, 2019

Posted on 11:42 am, Friday, March 22, 2019. Tags: , , , , , , ,

Kīlauea is not erupting. Rates of seismicity, deformation, and gas release have not changed significantly over the past week.

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Map of selected earthquakes beneath a portion of southeast Hawai`i from May 4, 2018 to March 14, 2019, showing principally aftershocks following May 4, 2018 M6.9 earthquake. Black dots indicate epicenters of 13,083 earthquakes located during this time interval; yellow stars show locations of the M6.9 earthquake and the March 13, 2019 M5.5 earthquake. Data source: U S Geological Survey, Hawaiian Volcano Observatory.

Volcano Watch: Magnitude 5.5 earthquake – a bump in the night toward a mo​re typical seismic background

Posted on 9:35 am, Friday, March 15, 2019. Tags: ,

This is the same fault that was responsible for last May’s M6.9 earthquake.

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Volcano Watch: Kilauea activity update for March 15, 2019

Posted on 9:27 am, Friday, March 15, 2019. Tags: , , , , , , ,

Kīlauea is not erupting. Rates of seismicity, deformation, and gas release have not changed significantly over the past week.

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Volcano Watch: How is lava flow thickness measured and why does it matter?

Posted on 11:31 am, Thursday, March 7, 2019. Tags: , ,

During the first few years of Kīlauea Volcano’s Puʻu ʻŌʻō eruption, episodic high lava fountains produced multiple lava flows. After each event, Hawaiian Volcano Observatory scientists measured its thicknesses.

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USGS Hawaiian Volcano Observatory scientists installed a new battery in a summit webcam that provides a view into Halema‘uma‘u. Images from K3cam can be viewed on HVO's website at https://volcanoes.usgs.gov/observatories/hvo/webcam.html?webcam=K3cam. USGS photo: J. Kauahikaua, 03 March 2019.

Volcano Watch: Kilauea activity update for March 7, 2019

Posted on 11:23 am, Thursday, March 7, 2019. Tags: , , , , , , ,

Deformation signals are consistent with refilling of Kīlauea Volcano’s deep East Rift Zone (ERZ) magma reservoir.

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This ‘a‘ā flow erupted from fissure 8  on Kīlauea Volcano’s lower East Rift Zone on June 1, 2018, shows how the interior of a lava flow remains incandescently hot even though surface cooling forms a crust of solid rubble. Based on studies of lava flow cooling rates, it will take more than 130 days for a flow this thick (about 4.5 m, or 15 ft) to cool to a temperature of about 200 degrees Celsius (290 degrees Fahrenheit). USGS photo by A. Lerner.

Volcano Watch: How do lava flows cool and how long does it take?

Posted on 3:13 pm, Thursday, February 28, 2019. Tags: , ,

Since the end of the 2018 lower East Rift Zone eruption questions have surfaced concerning how long it will take for the new lava flows to solidify.

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