High resolution earthquake catalogs from the 2018 Kilauea eruption sequence
The 2018 Kīlauea eruption and caldera collapse generated intense cycles of seismicity tied to repeated large seismic (Mw ~5) collapse events associated with magma withdrawal from beneath the summit. To gain insight into the underlying dynamics and aid eruption response, we applied waveform-based earthquake detection and double-difference location as the eruption unfolded. Here, we augment these rapid results by grouping events based on patterns of correlation-derived phase polarities across the network. From April 29 to August 6, bracketing the eruption, we used ~2800 events cataloged by the Hawaiian Volcano Observatory to detect and precisely locate 44,000+ earthquakes. Resulting hypocentroids resolve complex, yet coherent structures, concentrated at shallow depths east of Halema‘uma‘u crater, beneath the eventual eastern perimeter of surface collapse. Based on a preponderance of dilatational P-wave first motions and similarities with previously inferred dike structures, we hypothesize that failure was dominated by coupled shear and crack closure.
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Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | public |
| bureauCode |
[
"010:12"
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|
| contactPoint |
{
"fn": "U.S. Geological Survey - ScienceBase",
"@type": "vcard:Contact",
"hasEmail": "mailto:sciencebase@usgs.gov"
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|
| description | The 2018 Kīlauea eruption and caldera collapse generated intense cycles of seismicity tied to repeated large seismic (Mw ~5) collapse events associated with magma withdrawal from beneath the summit. To gain insight into the underlying dynamics and aid eruption response, we applied waveform-based earthquake detection and double-difference location as the eruption unfolded. Here, we augment these rapid results by grouping events based on patterns of correlation-derived phase polarities across the network. From April 29 to August 6, bracketing the eruption, we used ~2800 events cataloged by the Hawaiian Volcano Observatory to detect and precisely locate 44,000+ earthquakes. Resulting hypocentroids resolve complex, yet coherent structures, concentrated at shallow depths east of Halema‘uma‘u crater, beneath the eventual eastern perimeter of surface collapse. Based on a preponderance of dilatational P-wave first motions and similarities with previously inferred dike structures, we hypothesize that failure was dominated by coupled shear and crack closure. |
| distribution |
[
{
"@type": "dcat:Distribution",
"title": "Digital Data",
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"accessURL": "https://doi.org/10.5066/P9DMIFMW",
"mediaType": "application/http",
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|
| identifier | http://datainventory.doi.gov/id/dataset/USGS_5e0f934ee4b0b207aa155342 |
| keyword |
[
"Kilauea",
"Kilauea Crater",
"USGS:5e0f934ee4b0b207aa155342",
"biota",
"earthquake occurrences",
"volcanology"
]
|
| modified | 2020-08-18T00:00:00Z |
| publisher |
{
"name": "U.S. Geological Survey",
"@type": "org:Organization"
}
|
| spatial | -180.0, -90.0, 180.0, 90.0 |
| theme |
[
"geospatial"
]
|
| title | High resolution earthquake catalogs from the 2018 Kilauea eruption sequence |
