Maui News

Volcano Scientists Gather for “Volatile” Meeting

September 12, 2019, 8:08 AM HST
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This week, a group of volcanic gas scientists from across the United States, including staff from the USGS Hawaiian Volcano Observatory (HVO), will gather at the Cascades Volcano Observatory in Vancouver, WA, for a workshop to improve and facilitate collaboration within the volcanic gas community during times of eruption or “volcanic unrest.” The attendees are a subset of a larger group of volcanologists that form CONVERSE (Community Network for Volcanic Eruption Response).

During Kīlauea Volcano’s 2018 lower East Rift Zone eruption and summit collapse, HVO worked around the clock to monitor, measure, and keep track of all aspects of the ever-changing volcanic activity. But HVO’s staff, which numbered 25-30 at the time, couldn’t do it alone, especially when it became clear that the eruption was not going to end after just a few days. Colleagues from other USGS volcano observatories, including those in Alaska, Washington, and California, cycled through the eruption response team, with some individuals assisting HVO staff for weeks at a time.

In addition to USGS colleagues who assisted with the Kīlauea eruption response, university scientists were also integral to the effort in many ways. The University of Hawaiʻi at Hilo (UHH) opened its doors to the entire eruption response team when HVO and Hawai’i Volcanoes National Park were evacuated. Furthermore, UHH scientists played a crucial role in monitoring the eruption, particularly in terms of situational awareness through UAS (unmanned aircraft systems, or drones) and rapid measurements of changing lava chemistry.

Still, USGS and UHH expertise is not limitless. In some cases, we needed to reach beyond our USGS and local university colleagues to other academic institutions for specialized expertise with certain instrumentation and measurement techniques.

For example, HVO measures gas emission rates and the chemistry of volcanic volatiles, but there are also many tiny liquid and solid particles (aerosols) emitted in volcanic plumes. During the 2018 eruption response, HVO did not have the equipment or staff to adequately measure both gases and particles, so colleagues from universities in the United Kingdom were invited to Kīlauea to study the aerosol content of the eruptive plumes.


Unfortunately, such collaborations are not always as easy or timely as they could be. The volcanology community within the United States and around the world is fragmented between various government agencies, including the USGS, NOAA, NASA, and others, as well as many other academic institutions, such as museums, universities, and colleges.


This is where workshops like the one this week come in, with the goal of streamlining collaborations between these varied groups. CONVERSE, a research coordination network funded by the National Science Foundation, brings together volcanologists from many different institutions to enhance the ability of the volcanology community to work together on scientific efforts. The network will focus first on U.S. researchers, and eventually on international collaborations.

Goals of CONVERSE include improved coordination during eruption response efforts so that critical data gaps—like aerosol particle measurements—are addressed. By facilitating smoother collaborations and, therefore, improved datasets, the volcanology community can more effectively advance understanding of magmatic and volcanic processes.

CONVERSE is not focused specifically on volcanic volatiles, but is an interdisciplinary collaboration, with scientists specializing in other research areas, including seismology, deformation, modeling, petrology, and public communications. Each of the CONVERSE subgroups will have its own focused workshops, and will later come together to create a broad, interdisciplinary plan for studying future eruptions in the United States. In some of those groups, Kīlauea’s 2018 eruption response will be a topic of much discussion—what went right during the eruption response, and where might we have been able to do better?


By asking such questions and bringing volcanologists from around the country together to answer them, CONVERSE aims to better monitor restless volcanoes. With more collaborative monitoring, we can collect more and higher quality data, and ultimately better understand how volcanoes work, including ours here in Hawaiʻi.

A USGS gas geochemist and colleagues from the United Kingdom carry multi-gas sensors as they approach the degassing fissure 8 cone during Kīlauea Volcano’s 2018 eruption. The collaboration between HVO and UK universities allowed for better characterization of the aerosols emitted during the eruption, which, in turn, has better informed the larger volcanology community about the chemistry of these kinds of plumes. USGS photo by P. Nadeau, August 2018.

Volcano Activity Updates

Kῑlauea Volcano is not erupting and its USGS Volcano Alert level remains at NORMAL ( Updates for Kīlauea are now issued monthly.

Deformation monitoring showed no notable changes in Kīlauea over the past week. Rates of seismicity across the volcano remained largely steady. Sulfur dioxide emission rates are low at the summit and below detection limits at Puʻu ʻŌʻō and the Lower East Rift Zone (LERZ). The water pond at the bottom of Halema‘uma‘u continues to slowly expand and deepen.

At or near the 2018 LERZ eruptive fissures, elevated ground temperatures and minor releases of gas (steam, tiny amounts of hydrogen sulfide, and carbon dioxide) persist. These are typical post-eruption conditions and are expected to be long-term.

Hazards remain at the lower ERZ and summit of Kīlauea. Closures and warnings in these areas should be heeded. The 2018 lava flows are primarily on private property; please be respectful and do not enter or park on private property.

Mauna Loa is not erupting. Its USGS Volcano Alert level remains at ADVISORY. This alert level does not mean that an eruption is imminent or that progression to an eruption is certain.

This past week, 49 small-magnitude earthquakes (less than M2.5) were detected beneath the upper elevations of Mauna Loa. Deformation measurements show continued summit inflation. No significant changes in volcanic gas release were measured, and fumarole temperatures remain unchanged.

Mauna Loa updates are issued weekly. For more info on the status of the volcano, please go to:

Five earthquakes with three or more felt reports occurred in Hawaiʻi this past week: a magnitude-2.4 quake 9 km (6 mi) south of Leilani Estates at 7 km (4 mi) depth on Sept. 11 at 4:47 p.m. HST; a magnitude-3.5 quake 7 km (4 mi) northeast of Pāhala at 32 km (20 mi) depth on Sept. 9 at 10:24 p.m. HST; a magnitude-1.7 quake 5 km (3 mi) southwest of Volcano at -0 km (-0 mi) depth on Sept. 6 at 8:06 p.m. HST; a magnitude-3.2 quake 6 km (4 mi) southwest of Volcano at -0 km (-0 mi) depth on Sept. 6 at 7:58 p.m. HST; and a magnitude-2.7 quake 2 km (1 mi) south of Volcano at 2 km (1 mi) depth on Sept. 5 at 9:40 a.m. HST.

HVO continues to closely monitor both Kīlauea and Mauna Loa for any signs of increased activity.

Volcano Watch ( is a weekly article and activity update written by U.S. Geological Survey Hawaiian Volcano Observatory scientists and affiliates.

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