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Event Report, infrasound

Halma’uma’u Rockfall July 23, 2014

Volcanic Infrasonic Event – VIE140723

Prepared by:  ISLA
Source: Rockfall event at Halema’uma’u Crater
Location: 19°24’15.34″N 155°16’49.47″W
Origin Time: Reported around 10:00 HST 07/23/2014
IS Array: MENE, UH Infrasound network (data available through IRIS)
Data Quality: DQ is less than optimal due to sensor noise issue

A rockfall and “ash event” was reported by the National Park at Hawai’i Volcanoes National Park on 23 July 2014. The event was captured on the summit webcam (figure 1), as well as from the Jagger Museum overlook (figure 2). Continue reading Halma’uma’u Rockfall July 23, 2014 →

Event Report, infrasound

Unknown Infrasonic Event – XIE140718

Unknown Infrasonic Event – XIE140718
Prepared by: ISLA
Distribution Date: 18 July 2014
Source: Unknown
Location: Keauhou, HI
Origin Time: ~4pm HST 07/17/2014 or ~2:00 UTC 07/18/2014
Description: A very large “boom” was reported in the Keauhou area of Kona, along with buildings shaking.
IS Array: I59US, KHLU, InfraSound LAborotory (ISLA) test rig “AACE”
Data Quality: Good, test rig at ISLA was undergoing high frequency noise test

Summary: A large booming noise was reported in Kona near the Keauhou and Kahalu’u area on 07/17/2014 at around 4pm local time. Witnesses say that buildings shook and car alarms went off. The boom was followed by the sound of jets (reported by several witnesses). This signal was clearly recorded at I59US and set off an automated large amplitude alert at ISLA. Continue reading Unknown Infrasonic Event – XIE140718 →

Event Report, infrasound

Sangeang Api Eruption

Volcanic Infrasonic Event – VIE140530

Prepared by:  ISLA
Distribution Date: 06/13/2014
Source: Volcanic Eruption (Plinian)*
Location: Sangeang Api (8.2°S 119.07°E ) Indonesia
Origin Time: 140530 ~ 07:56-8:30 UTC [1,2]
Description: Telesonic signal below 0.1 Hz
IS Array: I39PW (Palau), EOS (Singapore), I04AU, I06AU, I07AU
Data Quality: Good in Palau and Australian sites, not so good in Diego Garcia

Summary: DRAFT report Continue reading Sangeang Api Eruption →