BMKG: Anak Krakatau eruption causes no unusual sea conditions in Sunda Strait

The latest eruption of Mount Anak Krakatau has not produced abnormal sea levels or currents in the Sunda Strait, Indonesia’s Meteorology, Climatology and Geophysical Agency said Tuesday.

Acting Deputy for Geophysics Ardhasena Sopaheluwakan said BMKG monitoring from 20 tsunami gauges and an HF radar array in the Carita and Tanjung Lesung areas showed a tsunami probability below 50 percent. “Until this morning, no abnormal rise in sea levels or significant changes in surface current patterns indicating a potential tsunami had been detected,” he said in Jakarta.

Sea conditions remained stable, with wave heights forecast at 0.5 to 3 meters. BMKG expected surface weather to remain mostly clear to partly cloudy from September 8 to 13.

The agency also joined the National Disaster Management Agency and the Transportation Ministry in efforts to clear volcanic ash from the atmosphere. The agencies conducted five weather-modification flights using two Cessna Caravan aircraft based at Pondok Cabe and Halim Perdanakusuma airports. One flight seeded salt, another dispersed calcium chloride, and three sprayed water mist into the atmosphere.

PVMBG recorded another small Strombolian eruption at Anak Krakatau at 7:49 a.m. local time. The eruption lasted 19 seconds and reached a maximum amplitude of 48 millimeters, alongside declining geomagnetic disturbance and volcanic lightning activity. Despite the lack of tsunami indicators, BMKG urged people in ash-affected areas to limit outdoor activities and wear masks and protective eyewear outside.

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Until this morning, no abnormal rise in sea levels or significant changes in surface current patterns indicating a potential tsunami had been detected.