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On Maunaloa, the overall pattern is unchanged from last week. Elevated earthquake levels of 40-50 per day and GPS ground deformation continue, suggesting the deeper magma input continues to fill the volcano from below according to the USGS Hawaiian Volcano Observatory. “Shallower magma input (less than 2 miles, 3 km) was likely responsible for inflation […]
Maunaloa earthquakes remain steady, though still elevated above the early September background, as the volcano continues to adjust to the newly infilling magma. We review the available monitoring data and reports available courtesy of the USGS-HVO, including Volcano Watch articles on expected aftershocks after last month’s 5.0 under Pāhala and InSAR measurements of volcanoes and […]
We continue our Maunaloa coverage, reviewing last week’s flank earthquakes highlighed by two events with magnitudes of 5.0 and 4.6 at moderate depths under Pāhala, and placing them in spatial context relative to the other areas of earthquake activity. Summit seismicity is still elevated with another small swarm occurring today, suggesting magma is still filling, […]
Kīlauea’s steady pattern of eruptive activity ended this past week with a dramatic change in activity contained within its summit crater of Halemaʻumaʻu, just 9 days ahead of the eruption’s one-year anniversary. At 3pm on Tuesday, September 20th, several things began to happen at once. The lava level in the active lake began its 33 […]
The final weeks ahead of Kīlauea eruption’s one-year anniversary have brought subtle changes to monitoring signals from the volcano, with GPS and ground-tilt suggesting a recent shift to small-scale deflation. The overall character of the eruption remains steady, with the persistent open lava lake still circulating and providing great views to visitors, and all indications […]
Ooze-up lava flows added to the lava lake show this past week on Kīlauea, treating viewers to spectacular sights. Otherwise the eruption continues with its slow and steady changes, and no increased threat to people. Today we review webcam time-lapses, monitoring data and reports courtesy of the USGS Hawaiian Volcano Observatory that document the minor […]
While Kīlauea’s summit eruption continues steadily, neighboring Maunaloa volcano experienced a short swarm of 90 earthquakes on the evening of August 2nd before returning to background levels of activity. According to the USGS, “this activity is a relatively small increase in volcanic unrest and remains within the range of fluctuations observed over the past several […]
0 A few days shy of 3 months since its last visible lava, Kīlauea’s earthquakes show variations while Maunaloa remains relatively quiet. We review the current monitoring data and reports courtesy of the USGS Hawaiian Volcano Observatory, and add a short reflection on the 2020-21 eruption volume and depth in the context of other historical […]
0 Earthquakes quiet down near Maunaloa summit during this past week, while minor flank seismicity increases. At the same time, the summit GPS line appears to revert back to slight contraction, consistent with the recent cycles of summit filling and flank spreading that slowly build towards a future, not imminent, eruption. As a bonus feature, […]
0 Kīlauea’s lava lake slowly deepens within Halemaʻumaʻu crater, follow-up on Maunaloa activity earlier in the week, and a historical photo special based on this week’s Volcano Watch article: New on Kīlauea: – West Vent entry still sluggish but continuous, north branch dominant – Lava lake depth slowly deepens to 225 m / 738 ft […]