Key Facts
• On September 1, 7:00 PM, an eruption occurred on Iwo Jima’s west side.
• Eruption at Chidorigahama produced 1,000-meter-high plumes, activity continues.
• Island uplift caused by underground magma persists.
• Recent eruptions were concentrated on the southern Onnami Beach.
• Volcanic earthquakes surged late last month, accompanied by crustal deformation.
• High-temperature ejecta observed, indicating possible magma emission.
• Iwate Volcano’s alert level raised to 2 in October 2024.
• Satellite data shows ground deformation near Daijigokudani and Iwate’s west side.
• Caution advised within 2 km of Iwate’s western crater for large volcanic rocks.
Summary
Iwo Jima experienced a significant eruption on September 1, with plumes reaching 1,000 meters. The Japan Meteorological Agency confirmed ongoing volcanic activity and noted the island’s continued uplift due to underground magma. Recent eruptions, previously concentrated on the southern Onnami Beach, shifted following a surge in volcanic earthquakes and crustal deformation late last month. Observations suggest possible magma emission from the crater. Meanwhile, Iwate Volcano, under alert level 2 since October 2024, shows reduced seismic activity but ongoing ground deformation near Daijigokudani and its western side. Authorities urge caution within 2 km of Iwate’s western crater due to potential large volcanic rocks.
