A volcano located about 158 kilometres west of Jakarta erupted on Friday (10 April) evening just as the city executed its partial lockdown through large-scale social distancing restrictions.
Indonesia’s Center of Volcanology and Geological Hazard Mitigation (PVMBG) reported on Saturday (11 April) that the Anak Krakatau has erupted on Friday and Saturday.
The first eruption happened at 9.58pm local time on Friday, spewing a 200-meter-high column of ash and smoke. This eruption lasted for about 12 seconds.
The second eruption took place at 10.35pm local time the same day. It was much stronger than the first one, spewing 500 meter-high of ash column, and lasted for 38 minutes.
On the Geological Disaster report today (13 April), PVMBG stated that the last eruption of Anak Krakatau volcano sent up to 2,000 meter-high of ash column on Saturday, even greater that the night before.
After the volcano erupted, the resident of Jakarta said that they heard a loud rumble on Friday midnight up until early Saturday morning. They assumed that the sound was coming from the volcano eruption.
“[The sound] did not come [from Anak Krakatau], but from some other source, but we still cannot determine the source,” PVMBG western volcano mitigation head Nia Khaerani told The Jakarta Post on Saturday.
The Anak Krakatau lies in the Sunda Strait, between the islands of Java and Sumatera. This volcano emerged from the remains of the biggest blast ever recorded in the Krakatau volcano eruption in 1883.
Six Indonesian volcanoes erupted
Indonesia is located in the Pacific Ring of Fire, an area where many active volcanoes are located and frequent earthquakes occur.
“Volcanic eruptions in Indonesia are a common thing as they happen every day,” PVMBG head Kasbani said on Saturday, adding that the eruptions did not happen simultaneously.
According to PVMBG’s Geological Disaster Report dated 13 April 2020, six volcanic eruptions were reported to occur in Indonesia in the past one month, including Anak Krakatau volcano.
Ibu volcano in North Moluccas erupted last Sunday (12 April). The 1,340m height volcano has spewed 400 meter-high of ash column.
The highest volcano in Java, Semeru volcano, also erupted on Saturday. This 3,673m height volcano is located in East Java and the eruption has sent 400-meter-high of ash column.
Besides that, Kerinci Volcano, a 3,805m height volcano in West Sumatra, was last reported to have erupted on 30 March. It spewed 600-meter-high of ash column. This volcano is the tallest in Sumatra.
Merapi erupted just a day earlier (29 March), spewing 1,500-meter-high of ash column. The 2,968m height volcano is located on Java Island, connecting the provinces of Yogyakarta and Central Java.
The sixth Indonesian volcano that erupted in the past month is Dukono volcano in North Moluccas. The volcano, 1,229m in height, spewed a 400-meter-high ash column on 26 March.

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