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| Titel |
Infrasonic Monitoring Network on the Big Island of Hawaii |
| VerfasserIn |
Weston Thelen, Milton Garcés, Jennifer Cooper, Nickles Badger, Anna Perttu, Brian Williams |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250083435
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| Zusammenfassung |
| The USGS Hawaiian Volcano Observatory (HVO) with the participation of the
University of Hawaii Infrasound Lab (ISLA) installed three new permanent
infrasound arrays on the south half of the Island of Hawaii. Together with three
existing permanent arrays maintained by ISLA, the current infrasound network
around Kīlauea and Mauna Loa volcanoes is one of the most advanced of any
volcano in the world. Open-vent volcanoes such as Kīlauea are particularly good
infrasound emitters as lava spattering and unsteady gas release is common. The
network was designed with two main goals in mind: 1) to monitor and study the
infrasound sources associated with the ongoing Pu`u `Ō`ō and Halema’u’mau
eruption, and 2) to detect in near real-time new eruptions at Mauna Loa or Kīlauea
volcanoes. Each HVO array consists of 4 sensors, which form an equilateral triangle
~100 m on a side surrounding a central sensor. Three other permanent arrays
maintained by ISLA (I59US, MENE, KHLU) have been operational since 2000, 2006,
and 2009, respectively, and consist of a combination of Chaparral 25 and 50
sensors. Each infrasound instrument within the HVO arrays is built around an low-
cost AllSensor MEMS sensor, which has higher noise characteristics than a
Chaparral 25, but similar frequency response. ISLA also operates stations on Maui
and Kauai that provide --statewide coverage. Since the full network has been
established, we have recorded several infrasound signals including infrasonic
tremor from Halema`uma`u, collapses from the craters of Halema`uma`u and Pu`u
`Ō`ō, and other natural and anthropogenic infrasound from diverse sources on-
island, offshore, and aloft. Future developments will include real-time detection,
location, and identification of infrasonic signals for eruption notification. We hope
to increase public awareness of volcanic infrasound by posting real-time locations
on an interactive display, similar to how seismicity is currently reported. MENE
data is presently available, and the HVO infrasound data should be available for
research projects through the IRIS Data Management Center beginning in March
2013. |
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