PPT Slide
March 27 Small volcanic seism were observed on the northwestern foot of the mountain, JMA (Japan Meteorological Agency) Sapporo and UVO (Usu Volcano Observatory, Hokkaido Univ). 23:30 UVO, Dr. Okada, made a phone call about volcanic seism to Town Official. March 28 0:50 First Volcanic Observation Report, JMA Muroran 2:50 First Volcanic Advisory, JMA Muroran 3:00 Hokkaido Government Information Headquarters set up. 8:30 Sobetsu Town Usu Volcano Countermeasure Headquarters set up. 9:30 Date City and Abuta Town Countermeasure Headquarters set up. 16:30 Sobetsu Town C. H. provided warnings to residents: recommended evacuation 408 residents. March 29 Volcanic activities (seism) increase, Magnitude 3.4 10:30 Hokkaido Government Countermeasure Headquarters set up. 11:10 First Volcanic Alert, JMA Muroran. 13:00 Sobetsu Town C. H. issued evacuation advice Toyako-onsen, etc. residents. 13:30 Date City C. H. and Abuta Town C. H. issued evacuation advice. 18:30 Three Municipalities C. H. upgraded evacuation advice to evacuation order. March 30 Almost of residence, 10,545 people, were finished evacuation. March 31 13:10 First eruption, on the West foot of Mt. Usu, Nishi-yama. 13:21 Abuta Town’s evacuation area was expanded. April 1 12:00 Eruption, on the North West of Mt. Usu, Konpira-yama.
Volcanic Activity and Crisis Management of Municipalities Before Eruption of Usu Volcano