NSF SAGE: Special Event: Hawaii

Posted: 2018-05-04 Last updated: 2018-05-10

This Special Event web page is intended to provide direct links to and images of data and materials available from NSF SAGE programs and preliminary research results from the seismology community. We welcome any additional contributions containing original content that might be of interest to the research community. Please send them to the email address listed below.

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The May 4, 2018, Mw 6.9 earthquake in Hawaii

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Event parameters (from USGS) ¶

These are preliminary results and are subject to change without notice. Please check the USGS page for the latest official information.

Magnitude	6.9
UTC Time	Friday May 4, 2018 at 22:32:55 UTC
Location	19.370°N 155.032°W
Depth	5.0 km
Region	Hawaii
Distance	16km SW of Leilani Estates, Hawaii
Details	USGS Executive summary page

Links ¶

: USGS Executive summary page; 3D model of the Kilauea Volcano’s summit lava lake; Webcams, Kīlauea Volcano, Summit; Tilt and GPS Deformation Data; USGS Event KML; Volcano Monitoring Data at Kīlauea; Volcano Watch

: Berkeley Seismo Lab Seismo Blog

: Community Event Response to the May 2018 Kīlauea Volcano, Hawaii Eruption

: GEOFON Program Event page

: Last earthquakes analyzed by GEOSCOPE

: European-Mediterranean Seismological Centre Earthquake; SeismicPortal

: Pele, the Hawai’i Goddess of Fire, Lightning, Wind, and Volcanoes

: IRIS Earthquake Sci, @IRIS_EPO; Jascha Polet, @CPPGeophysics; patton_cascadia, @patton_cascadia; Anthony Lomax, @ALomaxNet

: Products for this event; IRIS DMC Event Page; Interactive Earthquake Browser; IRIS Special Events Archive

Figures ¶

[GEOSCOPE Observatory] Automatic determination of source parameters using
the SCARDEC method

[Volcano Watch, U.S. Geological Survey Hawaiian Volcano Observatory]
Over 500 earthquakes were located by the USGS Hawaiian Volcano
Observatory (HVO) between noon Friday and noon Saturday,
May 4-5, 2018. A magnitude-6.9 earthquake at 12:32 p.m. HST
on Friday was preceded by two foreshocks with magnitudes of 5.4
and 4.4 at 11:32 a.m. and 11:38 a.m., respectively, and followed
by eight aftershocks with magnitudes greater than 4.0, including a
magnitude-5.3 at 2:37 p.m. Moderate to strong aftershocks should be
expected for weeks to months to come. The earthquakes are related to
the ongoing intrusion into Kīlauea’s East Rift Zone and reflect adjustments
beneath the south flank of the volcano. USGS map.>/p>

[NZA Regional Network (AZ)] Seismic waveforms for closest station
(Closest station with identified signal. Not filtered).

[Jay Patton, Humboldt State University] Earthquake-Volcanic Eruption Report:
M 6.9 Hawaii (& USGS Seismicity 1918-2018 M>= 3.5)

[IRIS DMC Event Plots Product] Combined and aligned on origin 0.3 to 1.0 Hz
BHZ (click on image to access the EventPlots).

Videos & Animations ¶

Zhigang Peng, Georgia Tech Sonification — [Zhigang Peng, Georgia Tech] Sonification of a nearby seismic station
that recorded both the M5.4 and 6.9 sequences, as well as some gliding sounds.
Such sounds could be related to gliding volcanic tremor during or preceding volcanic
eruptions, or could be generated by man-made sources such as air traffics
(click image to download).

[IRIS DMC GMV Product] LHZ Ground Motion Visualization for Mw 6.9
earthquake in Hawaii (click on image to access the GMV video).

GMV 3C AK — [IRIS DMC GMV Product] 3-Component LHZ, LHN and LHE Ground Motion
Visualization for Mw 6.9 earthquake in Hawaii
(click on image to access the GMV video).

Miscellaneous Contributions ¶

M6.9 recorded with geophones in NV & OK

[Jim O'Donnell, BC-Geophysics] The M6.9 was recorded using a Sigma 4 recorder with geophones in both Boulder City (BC), NV and near Ponca City, OK with the KawLake seismic array which is being utilized to record the seismicity in OK. By using a very good seismic recorder, low noise, we are able to inverse filter the data from the geophone response down to a much lower frequency.

The Boulder City site used 1 Hz, 2.5 Hz (hs), and 4.5 Hz Sunfull geophones in the Z direction, while the OK site used a 3c 2.0 Hz geophone compared to a CMG 40T seismometer. The event is shown below with both time series and amplitude spectra in velocity. The records are attached, with a map showing the location of both sites and the M6.9 epicenter..