🔴 Live Now: Code Yellow - Kilauea Volcano, Hawaii (Multi-Cam)
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- čas přidán 22. 07. 2024
- July 23, 2024, 9:43 AM HST: Activity Summary: Kīlauea is not erupting. Localized earthquake and ground deformation rates in Kīlauea’s upper East Rift Zone increased significantly twice in the past 24 hours, prompting a Status Report and brief alert level change. As of this morning, seismicity and ground deformation rates have decreased but remain elevated. The pulsing nature of this activity may represent stages in intrusive activity beneath the upper East Rift Zone region. Additional seismic pulses or swarms may occur with little or no warning and result in either continued intrusion of magma or eruption of lava.
Summit and Upper Rift Zone Observations: Over the past 24 hours, there were approximately 50 earthquakes detected beneath Kīlauea’s summit and approximately 357 earthquakes detected beneath the upper East Rift Zone, mostly at depths of 0-4 km (0.0-2.5 mi) beneath the ground surface. The most significant increase in earthquake counts was observed beneath the upper East Rift Zone with three times the 111 events detected beneath the upper East Rift Zone in the previous 24 hours. Most events were smaller than magnitude-2, but there were 13 earthquakes magnitude-3 or higher in the upper East Rift Zone. The largest event was a magnitude-3.4. Earthquake activity was accompanied by an abrupt change in ground deformation patterns in the upper East Rift Zone, shown by the ESC tiltmeter. Tiltmeters in Kīlauea summit region (instruments SDH, southwest of the summit, and UWE, northwest of the summit) did not show significant changes associated with this activity. GPS instruments around the summit region continue to show longer-term, gradual inflation since the end of the June 3, 2024, eruption. The most recent measurement of the summit's SO2 emission rate was approximately 100 tonnes per day on July 17, 2024.
HVO field crews examined Chain of Craters Road in Hawaiʻi Volcanoes National Park this morning and did not observe any major cracks associated with the recent activity.
Middle and Lower Rift Zone Observations: Rates of seismicity and ground deformation beneath the middle and lower East Rift Zone and lower Southwest Rift Zone remain low. Recent eruptive activity and ongoing unrest have been restricted to the summit and upper rift zone regions. Measurements from continuous gas monitoring stations downwind of Puʻuʻōʻō in the middle East Rift Zone-the site of 1983-2018 eruptive activity-remain below detection limits for SO2, indicating that SO2 emissions from Puʻuʻōʻō are negligible.
Analysis: Magma has been repressurizing the summit storage system, activating pulses of earthquakes in the caldera south of Halemaʻumaʻu and in the upper East Rift Zone. The pulsing nature of recent activity may represent stages in intrusive activity beneath the upper East Rift Zone region. Additional seismic pulses or swarms may occur with little or no warning and result in either continued intrusion of magma or eruption of lava. Changes in the character and location of unrest can occur quickly, as can the potential for eruption, but there are no signs of an imminent eruption at this time.
Main Sources:
USGS
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Windy.com - so2 and wind data and maps
Google Earth - maps
USGS - earthquake data and activity reports
Smithsonian Institute - Volcanic activity
RaspberryShake.com - earthquake activity
VolcanoDiscovery.com - Research
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