(BIVN) – The eruption within Halemaʻumaʻu crater at the summit of Kīlauea Volcano continued over the past 24 hours, although scientists reported a short pause in activity early this morning.
“Tremor at the summit has been gradually decreasing over the past 24 hours,” the USGS Hawaiian Volcano Observatory said in a Friday morning update. “Summit tilt was deflationary yesterday, and inflation initiated early this morning. All recent activity has been confined to the crater, and there are no indications of activity migrating elsewhere on Kīlauea.”
From this morning’s activity update:
Halemaʻumaʻu Lava Lake Observations: Eruption of lava from the western vent into the active lava lake surface (approximately 2.5% of Halemaʻumaʻu crater floor) continued until about 1:45 a.m. H.S.T. this morning, at which point lava stopped entering the active lake area; lava lake circulation stopped by 3:15 a.m. H.S.T. Around 4:45 a.m. H.S.T. lava started entering and quickly resurfaced the active lake area. However, since 7 a.m. H.S.T. this morning the effusion rate has markedly decreased and hot moving lava is limited to the vicinity of the lava source on the floor of the active lake area. The highest point on the Halemaʻumaʻu crater floor has risen approximately 97 meters (318 feet) since the eruption began on September 29, 2021. The erupted volume is 53.6 million cubic meters (70.1 million cubic yards) of lava as measured on March 4, 2022.
Summit Observations: Summit tiltmeters recorded slow deflation yesterday, with inflation initiating early this morning. Seismic data shows that the volcanic tremor has gradually decreased over the last 24 hours, but tremor remains above background levels. A sulfur dioxide (SO2) emission rate of approximately 1900 tonnes per day (t/d) was measured on March 10.
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.