USGS volcano and eathquake monitoring restored after Tropical Storm Iselle

• 10 years ago

MEDIA RELEASE

ISLAND OF HAWAI‘I, Hawaii— As of Wednesday afternoon, August 13, all power issues were resolved and the U.S. Geological Survey Hawaiian Volcano Observatory resumed monitoring volcanoes and earthquakes. HVO had been less than fully operational since the previous Friday morning after tropical storm Iselle directly hit the Island of Hawai‘i on August 7. HVO provides continuous, critical updates on the ongoing Kīlauea eruption, earthquake data, and webcam images to emergency managers and island communities for their safety and economic well-being.

The instrument networks and monitoring computer systems designed by HVO staff weathered the tropical storm with very little damage. However, they remained offline to the public for several days because internal power problems needed to be assessed, and replacement parts had to be ordered from the mainland U.S.

During the few days when HVO monitoring capabilities were impaired, earthquake monitoring duties were delegated, by pre-arrangement, to the USGS National Earthquake Information Center in Golden, Colorado. Colleagues at the Alaska Volcano Observatory took over scanning satellite imagery for any information about Hawaiian volcanoes. HVO also temporarily added one seismometer near Kīlauea caldera and a camera looking at the Halema‘uma‘u lava lake with telemetry that could be accessed directly without first going through HVO computer systems, which were intermittent until August 13.

After the passage of Iselle, before the howling wind and heavy rains had stopped, HVO staff were already at the observatory dealing with the aftermath of the storm—and worked through the weekend to repair damage to the observatory’s power system. Complete restoration of the system was accomplished within a week of the storm’s impact.

According to HVO Scientist-in-Charge Jim Kauahikaua, volcanoes on the Island of Hawai‘i continue to be closely monitored. “Fortunately, Iselle caused no or little damage to our field instruments, and HVO’s monitoring network is now functioning normally, so we can continue to keep State and County Civil Defense informed with the critical information they need to keep Island of Hawai‘i communities safe.”

Updates for Hawaii’s active volcanoes and earthquake data for the state of Hawaii are posted on the USGS Hawaiian Volcano Observatory website.

Volcano Watch: KÄ«lauea activity update for August 14, 2014

The summit lava lake within HalemaÊ»umaÊ»u Crater produced nighttime glow that was visible via HVO’s webcam over the past week. The lava lake level fluctuated slightly but was roughly 40 m (130 ft) below the rim of the Overlook crater.

On the East Rift Zone of Kīlauea Volcano, the June 27 flow from Puʻu ʻŌʻō continued to advance toward the northeast and had reached 8.7 km (5.4 miles) from the vent by August 13. Within the Puʻu ʻŌʻō crater, several small lava ponds were active on the crater floor.

Three earthquakes were reported felt during the past week on the Island of Hawai‘i. On Thursday, August 7, 2014, at 6:24 a.m., HST, a magnitude-4.5 earthquake occurred 6 km (4 mi) northeast of Kawaihae at a depth of 17 km (10 mi). On Monday, August 11, at 9:47 p.m., a magnitude-3.6 earthquake occurred 1 km (.5 mi) northwest of ‘Ō‘ōkala at a depth of 40 km (25 mi). On Tuesday, August 12, at 8:28 p.m., a magnitude-3.5 earthquake occurred 23 km (14 mi) northeast of Kukuihaele at a depth of 30 km (19 mi).

Visit the HVO website (http://hvo.wr.usgs.gov) for current Kīlauea, Mauna Loa, and Hualālai activity updates, recent volcano photos, recent earthquakes, and more; call (808) 967-8862 for a Kīlauea summary; email questions to askHVO@usgs.gov.

KÄ«lauea Caldera from HVO (8/6-14/14)

Halemaʻumaʻu Overlook Vent from HVO (8/6-14/14)

Time-lapse movie of Halemaumau Crater (8/6-16/14)

Thermal image movie of Halemaumau Crater (8/6-14/14)

Multi-image movie of Pu’u ‘O’o Crater. (8/6-16/14)

Thermal image movie of Pu‘u ‘O‘o Crater (8/6-14/14)

Pu’u ‘O’o Crater East Flank. (8/6-14/14)

Pu’u ‘O’o Crater South Flank. (8/6-15/14)

Pu’u ‘O’o Crater North Flank. (8/6-14/14)