Effusive activity and ash to 7.3 km (24 000 feet) at Big Ben volcano, Heard Island, Indian Ocean

Satellite observations show that Heard Island’s Big Ben volcano remains active, with lava flows detected through late January and February 2026. The Darwin VAAC reported that the ash plume from a brief eruption around 14:00 UTC on February 11 reached 7.3 km (24 000 feet) above sea level and fully dissipated by the following day. Source