The latest survey results of Nishinoshima Island (as of July 2016): no major changes were identified.
Geospatial Information Authority of Japan (GSI) took aerial photographs of Nishinoshima Island on July 25th, 2016 using its Unmanned Aerial Vehicle (UAV). The latest analysis results are now publicly available.
The area was approximately 2.75 square kilometers. The elevation of highest point was approximately 142 meters. The volume was 87.22 million cubic meters. (These values are unofficial and provided for reference purposes.)
This photographing was performed by GSI’s Unmanned Aerial Vehicle (UAV) launched from Chichijima Island, Ogasawara Village, Tokyo, with the cooperation of the Ministry of Defense. GSI initiated photographing from December 2013 and obtained topographic changes on a regular basis. This operation was the tenth photographing.
Comparison of measurement results
Comparison of measurement results with aerial photographs and orthophotographs taken around Nishinoshima Island in this March is shown in the table below.
Comments on the measurement results from Professor Setsuya Nakada
Here are comments on these latest measurement results from Professor Setsuya Nakada, Earthquake Research Institute, The University of Tokyo, (Leader of The Nishinoshima General Observation Team, Coordinating Committee for Prediction of Volcanic Eruption):
Aerial photographs and related information
Aerial photographs and related information are being published on the Internet under "GSI Maps".
URL: http://maps.gsi.go.jp/#15/27.244557/140.879660/&base=std&ls=std%7C20160725dol&disp=11&lcd=20160303dol&vs=c1j0l0u0f0&d=vl (in Japanese)
Website for information relating to eruption activity in and around Nishinoshima Island
URL: http://www.gsi.go.jp/gyoumu/gyoumu41000.html (in Japanese)