Nishinoshima Island volcanic activity sea discoloration (IMAGE)
Caption
This photo shows a sample of the (Fe + Al)/Si distribution as a volcanic activity index from May 16 to June 25 around Nishinoshima Island: (a) May 16-23, 2020, (b) May 24-31, 2020, (c) June 1-8, 2020, (d) June 9-16, 2020, (e) June 17-24, 2020, (f) June 25-July 2, 2020. It is mapped by applying the equation ((Fe+Al)/Si)=45.4(x)?13.3 to the SGLI data. From this, it can be seen that during this period, the distribution on the northeastern part of the island rises, and then the discoloration gradually progresses to the sea area around the island, before it disappears. Nishinoshima Island is located approximately 1,000 km south of Tokyo, Japan. The original data used for this product have been supplied by JAXA's JASMES (JAXA Satellite Monitoring for Environmental Studies).
Credit
JAXA/Yuji Sakuno
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