Multiscale and Multisensor Mapping of the 2018 Sierra Negra Eruption, Galápagos, Ecuador

Abstract:

The 2018 eruption of Sierra Negra Volcano in the Galápagos, Ecuador produced~ 200 x 10 9 m 3 of lava in two pulses beginning 01 July and 31 July. The first pulse occurred from a series of fissures that began at the north rim of the caldera and propagated discontinuously to the NW. These caldera rim fissures were short-lived (< 10 days) and produced'a'a flows that advanced 2 to 7 km down the volcano flank to the north. The second pulse occurred on mid-to lower-flank vents, lasted 57 days and produced some flows that reached the ocean and extended the coastline by~ 1km. In October 2018 a field expedition was conducted that used drones to map the vent regions and proximal lava flows at the caldera rim. Over a period of five days, we mapped an area of~ 20 km 2 at a horizontal resolution of 20 cm. These data are used to refine the map of flow boundaries, delineating the location of eruptive vents, scoria …

Año de publicación:

2019

Keywords:

Fuente:

google