The ongoing eruptive phase at Anak Krakatau has reached a new milestone, since 7:38 p.m. WIB on April 22, with an occasional roar of explosions
Around 10:46 p.m. WIB, an incandescence is visible on the webcams and a dull sound of eruption was heard as far as Cigeulis / Pandeglang Regency at 60 km.., the activity can be followed on the webcam of the Indonesia YouTube channel.
The seismicity of April 22 is characterized by:
- 8 eruption earthquakes, with an amplitude of 37 to 60 mm and an earthquake duration of 35 to 88 seconds.
- 8 blast/emission earthquakes, with an amplitude of 15 to 36 mm and an earthquake duration of 20 to 65 seconds.
- And continuous tremor with an amplitude of 2-55 mm, mostly 50 mm.
Marine operations are restricted (Indopolitika)
VAAC Darwin has issued an orange aviation code.
The activity level remains at 2 / waspada, with recommendations:
The public/tourists are not allowed to approach the crater within 2 km of the crater
Sources: PVMBG, Magma Indonesia, Indopolitika.
During the last 24 hours, thanks to the monitoring systems of the Popocatépetl volcano, 27 low intensity exhalations have been detected, accompanied by water vapor, gas and sometimes slight amounts of ash.
In addition, two minor explosions were recorded at 01:52 and 05:59.
At the seismic level, 41 minutes of low amplitude tremor and a volcano-tectonic earthquake were also detected, recorded today at 00:44, with a magnitude of 1.5.
During the morning and until 4:00 p.m. GMT on April 21, a low-level emission composed of volcanic gases and water vapor is observed, which disperses towards the southwest.
CENAPRED urges NOT TO APPROACH the volcano and especially the crater, because of the danger of falling ballistic fragments and, in case of heavy rains, to stay away from the bottom of the ravines because of the danger of mudslides and of rubbish.
The Popocatépetl volcanic alert remains at Amarillo fase 2.
The Azores Seismovolcanic Information and Monitoring Center (CIVISA) informs that the seismovolcanic crisis that has been occurring on the island of São Jorge since 4:05 p.m. (local time = UTC-1) on March 19 is still ongoing, extending , roughly speaking, along a strip in WNW-ESE direction, from Ponta dos Rosais to the Norte Pequeno – Silveira area.
The soil gas and temperature measurement campaign that CIVISA has been carrying out since the beginning of this crisis in the epicentral area has not, to date, led to the identification of any anomaly.
The latest satellite data available does not reveal any significant deformation.
The integration of the available information allows CIVISA to conclude that the tectonic structures where the historic eruptions of 1580 and 1808 took place, and the seismovolcanic crisis of 1964, in the Fissural Volcanic System of Manadas, have been reactivated, and it is possible to admit the occurrence of a deep magmatic intrusion.
CIVISA remains on ALERT V4 since 3:30 p.m. on March 23.
Source: CIVISA / update on 04.22.2022