Updated

The Smithsonian/USGS Weekly Volcanic Activity report covered ongoing eruptions at multiple volcanoes worldwide for the period September 10-16, including Strombolian eruptions and ash plumes at Krakatau (Indonesia), continuing activity with ash emissions and high SO2 output at Aira/Sakurajima (Japan), Dukono, Ibu, Karangetang and Lewotolok (Indonesia), Kanlaon and Mayon (Philippines), lava effusion at Great Sitkin (Alaska) and Kilauea (Hawaii), and thermal anomalies/lava flows at Klyuchevskoy and Krasheninnikov (Russia). All sites remained at low-to-moderate alert levels with localized ash and gas hazards but no reported casualties or major disruption.