The volcanic unrest continues around the world with new eruptions occurring around the world. The latest are the explosions of Agung volcano (Indonesia), Anak Krakatau (Indonesia), Mayon volcano (Philippines), the volcanic unrest of White Island (New Zealand). Finally some updates on the Kilauea eruption (Hawaii) and the Fuego eruption (Guatemala).
Eruption of Agung volcano on July 4, 2018
The seismicity of Agung is dominated by low frequency earthquakes, consistent with an effusion and an open system. The surface activity remains dominated by eruptions and ash emissions.
On July 4, 2018 at 12:20, a plume of ash and gas rose 2,500 meters above the summit. The new eruption lasted about 2 minutes and had an amplitude of 24 mm on the seismogram. In this awesome timelapse recorded at 7 am in Amlapura and from 11:15 – 15:36 in Datah, Karangasem, you can watch the ruptions at 1’24 and 1’50:
Satellite images indicate ongoing effusive activity and a dome growing by 4 to 5 million m³ last week. The flux of magmatic sulfur dioxide remains high, with 1,400 – 2,400 tonnes / day on 3 July, and 400 – 1,500 tonnes / day on 4 July.
Strombolian eruptions continue at Anak Krakatau, Indonesia
Anak Krakatau is exploding frequently since June 18, 2018. The last strombolian eruptions are however becoming stronger and more frequent – almost every 20 minutes – with lava bombs being ejected more than 1km away from the crater! That’s really amazing!
The lastest eruption occurred on July 3, 2018 at 5:33am, which lasted 40 seconds and had an amplitude of 38mm on the seismograph. Since then, Ash emission is continuous and drifting north.
Source: PVMBG & MAgma Indonesia
Mayon volcanic eruption on July 1, 2018 in the Philippines
After several months of rest, Mayon volcano erupted on July 1, 2018, at 12:30, sending blue and white clouds of ash 500 meters above the crater.
The phreatic eruption occurred around 12:30 local time. In March, the Philippine Institute of Volcanology and Seismology lowered the warning status of the volcano danger from the 3rd to the 2nd. Experts warn it wasn’t a good decision.
Update Fuego volcano eruption
More than three hundred people are still missing 1 month after a massive eruption occurred at Fuego in Guatemala. The eruption has now became the most powerful in recent years, affecting more than 1.5 million people.
Since the beginning of 2018, Fuego volcano erupted only twice, but has already killed more than 100 people.
Unrest at White Island in New Zealand
Since April-hand powerful sounds from the crater have been heard by visitors. They will stop when the geothermal system has adjusted to the new lake.
This lake is filling at a rate of 2,000 m³ per day … same rate as in 2003-2004, 2007-2008 and 2013, when previous lakes have drowned, leading to localized geysers and small geothermal eruptions, with occasional formation of small cones of tuff-debris around the vents. If the current lake filling continues at this rate, dome drowning is expected in 3-4 months.
However, observations during a recent overflight confirmed that volcanic activity remains at a stable and low level, with no sign of increasing volcanic disturbances. Therefore, current observations are consistent with minor volcanic unrest. Volcanic Alert Level 1 and aviation color code remains green.
Source: GeoNet – 04.07.2018
Kilauea eruption update
In the East rift zone of Kilauea, the activity of crack 8 continues. The lava flow underwent temporary blockages on July 3 and 4, which caused overflows near the Kapoho cone. These overflows have destroyed some more houses.
The National Weather Service reports a rare storm over the active lava field of the rift zone on July 2, that produced 1,200 lightnings in just 7 hours.
The NWS meteorologist says that the volcano played a major role in this stormy episode, being the basis of the emission of Pyro cumulus. The other actor was an air pocket colder than normal at a lower altitude.