Authors:
Sartika
;
Yohanes Hestrio
;
Kiki Veronica
and
Galdita Chulafak
Affiliation:
Aeronautics and Space Research Organization, National Research and Innovation Agency (BRIN), Jakarta, Indonesia
Keyword(s):
Anak Krakatoa, NDWI, Landsat, Image Processing.
Abstract:
The Anak Krakatoa is a small volcano located in the Sunda Strait, specifically between the islands of Java and Sumatra, Indonesia. The Anak Krakatoa is currently still an active volcano. This mountain has erupted many times and has undergone various changes in its height, shape, and area, with the last eruption in July 2022. This study shows the changes in Anak Krakatoa, especially its shape and size, based on Landsat remote sensing data from 1990 to 2022. Landsat imageries used in this study are Landsat 5,7, and 8. To obtain information on the site of Anak Krakatoa, it begins by separating the sea and land around the mountain using the Normalized Difference Water Index (NDWI). After the land is detected, then the area is calculated. The volcano reached its minimum area in 1988 and its maximum area in 2022.