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HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE

Low volcano eruption

Here’s an update on the volcano as of April 7th from the U.S. Geological Survey. Join us on a once in a lifetime experience on one of our luxury volcano tours.

HawaiʻiAN VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey
Thursday, April 7, 2022, 7:35 AM HST (Thursday, April 7, 2022, 17:35 UTC)
KILAUEA VOLCANO (VNUM #332010)
19°25’16” N 155°17’13” W, Summit Elevation 4091 ft (1247 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Activity Summary: The summit eruption of Kīlauea Volcano, within Halemaʻumaʻu crater, continued over the past 24 hours. All recent activity has been confined to the crater, and there are no indications of activity migrating elsewhere on Kīlauea.

Halemaʻumaʻu Lava Lake Observations: Eruption of lava from the western vent into the active lava lake (approximately 2.3% of the crater floor surface) and onto the crater floor continued over the past 24 hours. Yesterday morning and afternoon saw the continuation of lava ooze-outs near the northwestern and northeastern edges of the crater floor, before the breakout of an expansive ooze-out along the northern edge at 6:00 p.m.; lava activity persists in this area today, although its vigor is reduced. The active part of the lava lake showed continuous surface activity but its surface dropped slightly in association with summit deflation. Since the beginning of this eruption on September 29, 2021, the crater floor has seen a total rise of about 97 meters (318 feet). The volume of lava effused since the beginning of this eruption was approximately 64 million cubic meters (84 million cubic yards or 17 billion gallons) as measured on March 29, 2022.

Summit Observations: Summit tiltmeters began tracking deflationary tilt yesterday evening, which continues today at a reduced rate. Volcanic tremor remains above background levels, although the amplitude has declined slightly in association with summit deflation. A sulfur dioxide (SO2) emission rate of approximately 3,200 tonnes per day (t/d) was measured on April 6, 2022.

Rift Zone Observations: No unusual activity has been noted along the East Rift Zone or Southwest Rift Zone; low rates of ground deformation and seismicity continue along both. Measurements from continuous gas monitoring stations downwind of Puʻuʻōʻō in the middle East Rift Zone remain below detection limits for SO2, indicating that SO2 emissions from Puʻuʻōʻō are negligible.

Hazard Analysis: This eruption at Kīlauea’s summit is occurring within a closed area of Hawaiʻi Volcanoes National Park. Therefore, high levels of volcanic gas are the primary hazard of concern, as this hazard can have far-reaching effects downwind. Large amounts of volcanic gas—primarily water vapor (H2O), carbon dioxide (CO2), and sulfur dioxide (SO2)—are continuously released during eruptions of Kīlauea volcano. As SO2 is released from the summit, it reacts in the atmosphere to create the visible haze known as vog (volcanic smog) that has been observed downwind of Kīlauea. Vog creates the potential for airborne health hazards to residents and visitors, damages agricultural crops and other plants, and affects livestock. For more information on gas hazards at the summit of Kīlauea, please see: https://pubs.er.usgs.gov/publication/fs20173017. Vog information can be found at https://vog.ivhhn.org. 

Additional hazards include Pele’s hair and other lightweight volcanic glass fragments from lava fountains that will fall downwind and dust the ground within a few hundred meters (yards) of the erupting fissure vent(s). Strong winds may waft lighter particles to greater distances. Residents should minimize exposure to these volcanic particles, which can cause skin and eye irritation. 

Other significant hazards also remain around Kīlauea caldera from Halemaʻumaʻu crater wall instability, ground cracking, and rockfalls that can be enhanced by earthquakes within the area closed to the public. This underscores the extremely hazardous nature of the rim surrounding Halemaʻumaʻu crater, an area that has been closed to the public since early 2008. 

For discussion of Kīlauea hazards, please see: https://www.usgs.gov/observatories/Hawaiʻian-volcano-observatory/hazards.

Please see the Hawaiʻi Volcanoes National Park website for visitor information: https://www.nps.gov/havo/index.htm. Visitors to Hawaiʻi Volcanoes National Park should note that under southerly (non-trade) wind conditions, there is potential for a dusting of powdery to gritty ash composed of volcanic glass and rock fragments. These ashfalls represent a minor hazard, but visitors should be aware that such dustings at areas around the Kīlauea summit are possible. 

The Hawaiʻian Volcano Observatory (HVO) continues to closely monitor Kīlauea volcano.

HVO will continue to issue daily Kīlauea volcano updates until further notice. Additional messages will be issued as needed.

In addition to the morning Kīlauea Daily Update, HVO will issue a brief eruption “Status Report” around 3 p.m. HST daily due to frequent pauses in the eruption and the highly variable nature of the lava lake activity within Halema‘uma‘u crater. The addition of afternoon status reports does not reflect a change in hazards; these reports are intended to give Hawaiʻi Volcanoes National Park staff and visitors an idea of likely lava activity for the coming evening.

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