Volcanologists at the Alaska Volcano Observatory (AVO) are reporting increased activity at Shishaldin volcano. As a result, the Aviation Color Code was raised to Orange.
New activity/unrest was reported for 12 volcanoes. During the same period, ongoing activity was reported for 11 volcanoes.
A mud volcano erupted in Taiwan’s Pingtung County on July 11, 2023, ejecting steam and mud from several vents up to 2 m (6.5 feet) in the air.
Since its onset at 16:40 UTC on Monday, July 10, 2023, the eruption near Litli-Hrútur mountain on the Reykjanes Peninsula has seen a significant drop in intensity, with fewer and smaller lava fountains now compared to the initial stages.
After 6 days of intense seismicity between Fagradalsfjall and Keilir, Reykjanes Peninsula, Iceland, a new volcanic eruption has started just northwest of Litli Hrutur at around 17:00 UTC on July 10, 2023.
Since the onset of the seismic swarm in the Reykjanes Peninsula, on July 4, 2023, more than 8 500 earthquakes have been recorded in the area between Fagradalsfjall and Keilir. While seismic activity in this area is decreasing, deformation data strongly suggests that magma is rising toward the surface.
Shortly before midnight on July 6, 2023, a seismic sequence commenced close to Eldey Island on Reykjanes Ridge, approximately 10 km (6.2 miles) southwest off of Reykjanes Peninsula, Iceland. As a result, the Aviation Color Code was raised to Yellow.
10 days of continuous rainfall caused a large amount of volcanic material, debris and water to move down the slopes of the Semeru volcano on July 7, 2023, leading to destructive overflows and severe damage.
More than 4 700 earthquakes have been detected in the area between Fagradalsfjall and Keilir, Reykjanes Peninsula, Iceland since the start of seismic swarm on July 4, 2023. Ground deformation (GPS) observations show significant movements, indicating magma propagation in the region where earthquakes are highly concentrated. Magma intrusion is close enough to the Earth’s surface that a volcanic eruption could occur without further escalations in seismic activity or ground deformation.
Nicaragua’s San Cristobal volcano erupted on July 5, 2023, producing pyroclastic flows and huge amounts of ash.