BMKG says Sunda Strait safe, no tsunami detected amid Anak Krakatau activity

BMKG’s continuous monitoring indicates that the Sunda Strait crossing route is currently safe, with low tsunami probability according to HF-radar data as of 8 am Monday. Twenty tsunami gauges reported stable sea levels, and although volcanic lightning and geomagnetic activity increased between midnight and 4 am, both were less intense than the initial Sept 4 eruption. Surface currents are moving southwest at 0.4-0.9 knots, generating waves of 0.3-1.2 metres, and forecasts predict wave heights of 0.5-2.0 metres through 13 Sept. The agency has issued 39 SIGMETs for aviation, the latest showing ash plumes rising to 15,000 feet and drifting westward toward Sumatra and the Indian Ocean. Overall conditions are expected to remain clear to partly cloudy around the volcano and the strait.