Monitoring and analysis of nyamulagira volcano activity using modis data: case of the 2011-2012 eruption

Abstract

In this paper we analyzed the 2011-2012 eruption of Nyamulagira volcano using MODIS Data. Eruptions have been occurring every 3–4 years throughout the last century. Satellite infrared data, collected by MODIS sensor to estimate pixels thermal anomaly of hot spots were analized, the radiance emitted at 3,959 and 12.02μm for each pixel and the thermal emissions at Nyamulagira feall into three distinct radiating regimes released during the 2011–2012 eruption. Initial activity was detected on 6 November, at 19:55 UTC, with a large thermal anomaly with 28 pixels approximately on the north flank of the volcano. The anomaly was limited to the north flank. The anomaly reached a maximum size of 1188 pixels in January 2012. The size and intensity of the anomaly rapidly diminished to first April 2012 were no more than 2 piixels indicate the end of eruption.

Characteristics of Semilir Formation in Relationship With the Period of Volcanic Activity

“…Some researchers have conducted research in fields that are also related to periods of volcanic activities with approaches in accordance with their respective expertise and research objectives. Some of these researchers include Werner et al [5] with a volcanology approach; Belizal & Lavigne [6] with a geomorphological approach; Bagalwa & Karume [7] with a remote sensing approach; Armijos et al [8], Loughlin et al [9], Yamaoka et al [10] with a risk management approach; and Yan [11] with a gravity approach.…”