The Stromboli is still active. MIROVA registers thermal radiation with a power of 95 MW. Satellite images from August 6 show that the heat signature of the lava flow reaches relatively far down the flank and had made half the way to the sea. At this time the heat radiation was 323 MW. Intense heat radiation was also emitted from the explosive vents in the crater: the magma is high in the conveyor system. The strombolian explosions produce glowing tephra, which is deposited in the crater area. The tremor is still elevated. The eruptions can be observed via livecam.
Popocatepetl erupts ash clouds
In Mexico, the Popocatepetl volcano continues to emit ash clouds. These clouds rise up to an altitude of 7000 m above sea level and drift in a northwesterly direction. CENAPRED reports 2 explosions, 157 exhalations and 640 minutes tremor. The intense tremor indicates that a lot of magma is moving underground. An increase in activity may be expected in the next few days.
Although the Icelandic volcano Öræfajökull has been quite quiet in the last few months, the danger of an eruption is apparently not yet averted. IMO scientists have reported that the volcano emits gas that accumulates in subglacial meltwater. The researchers are trying to take gas samples in order to analyse the gas more precisely. So far, it has not become known exactly which gas it is and whether it is regarded as a sign of an imminent eruption. Earthquake activity had recently declined sharply and the IMO gave the all-clear signal that an eruption was no longer expected. However, nobody knows how Öræfajökull will behave shortly before an eruption. Blogger Jon Friman points to a study which shows that some volcanoes have seismic activity decreasing shortly before erupting.
Slamet: Raising the warning level
The volcano Slamet is located on the Indonesian island Java and last erupted in 2014. Now the PVMGB has raised the warning level of the volcano to “2”. The reason for this is a significant increase in seismic activity: between 1 June and 8 August, 51511 weak earthquakes were recorded in connection with magma rise. Kasbani, the chief volcanologist of Indonesia, explained that a large amount of magma had accumulated and that the energy in the volcano was high. Magmatic eruptions are imminent and a 2 km exclusion zone has been established around the crater.