Activity of Pacaya, Merapi, Lewotolok, and Kilauea.

The strombolian activity of the Pacaya has been accompanied in recent hours by moderate to strong explosions, accompanied by ash plumes between 300 and 500 meters above the crater, and ballistic projections 300 meters around the crater.

On the northern flank, two new lava flows, 50 and 200 meters long, are added to that of 550 meters long on the southwest flank.

These two types of activity, explosive and effusive, are liable to increase.

Sources: Insivumeh and University of Bristol

The Merapi erupted on Thursday, January 7, 2021 at 8:02 a.m. WIB. No visual rash was observed. (reported in yesterday's article)

This eruption was recorded on a seismograph with a maximum amplitude of 28 mm and a duration of 154 seconds.

A new eruptive episode occurred on January 7, 2021 at 12:50 WIB with an ash plume ± 200 m above the summit (± 3168 m above sea level). We observe that the ash column is white to gray with a weak to moderate intensity towards the northeast. According to BPPTKG, there was a pyroclastic flow at 12:50 WIB with a landslide for about 300 meters upstream of Kali Krasak. This eruption was recorded on a seismograph with a maximum amplitude of 21 mm and a duration of 139 seconds.

Other episodes are reported at 1:15 p.m. and 2:02 p.m. WIB, with pyroclastic flows less than 1,000 meters on the upper reaches of Kali Krasak.

The deformation of the Merapi, monitored using the EDM of reflectors RB1 and RB2, this week showed a shortening rate of 15 cm / day.

Sources: PVMBG, Magma Indonesia, BPPTKG

An eruptive episode was observed at Mount Ili Lewotolok on Friday January 8, 2021 at 08:20 WITA with an ash plume ± 1000 m above the summit (± 2423 m above sea level) drifting towards the 'Where is. This eruption was recorded on a seismograph with a maximum amplitude of 20 mm and a duration of 25 seconds.

Communities around Mount Ili Lewotolok as well as visitors / climbers / tourists are recommended not to undertake activities within 3 km of the summit / crater of Mount Ili Lewotolok and in sectoral areas from the southeast to '4 km from the summit.

Sources: PVMBG & Magma Indonesia

Lava activity is confined to Halemaʻumaʻu crater of Kilauea, with lava erupting from vents on the northwest side of the crater. Tuesday afternoon (January 5), the lava lake was 194 m deep and was perched 1 to 2 m. above its edge. SO₂ emission rates were still high.

West vents splashed from the top of a small cone plastered on the northwest wall of Halema'uma'u Crater. This morning, lava flows in a narrow channel to the lake and feeds a small domed fountain in front of the west vents probably from a submerged part of the vent.

The lava lake was 194 m deep on January 6 and had a volume of over 27 million cubic meters (35 million cubic yards). The most recent heat map (January 5) indicated that the dimensions of the perched lake were 760 by 520 m. for a total area of ​​28 ha - slightly smaller than December 30 when the map was made. Tuesday (January 5), the lake was perched about 1 to 2 m. above its narrow edges; the overflow on the narrow edge slowly raised a low wall around the lake similar to the wall around an above ground swimming pool.

The main island of colder and solidified lava floating in the lava lake continued to rotate counterclockwise, past the western lava source filling the lake, as the 11 smaller islands moved one by one. few but remained at the eastern end of the lake. The dimensions of the main island have remained the same: approximately 250 m in length, 135 m in width and approximately 3 ha in area according to the heat map of January 5. Measurements on Friday afternoon (January 1) showed the island's surface to be about 6m above the lake surface. Yesterday afternoon (January 4) the island was measured 7-8m above the lake surface.

Source: HVO-USGS - 01.6.2021, 9:02 a.m. HST