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Anomaly Detection and Image Spectrometry in Assesing Multitemporal Activity of the Turrialva Volcano, Costa Rica, and La Palma, Spain

Description: 

The aim of this paper is to present a geospatial methodology that involves a new thermal anomaly detection technique compared to expert-based techniques for the analysis of the temporal evolution of volcanoes' activity. We want to know what’s goin on not only in cases where volcanoes are close to urban areas, but also in relation to the regional environmental impact, where an important objective will be to establish relationships that allow linking spectral patterns with volcanic seismicity.

This methodology means a multi-source approach, applied to the analysis of correlations between hydrothermal alteration materials and spectral, thermal and reflective anomalies in volcanic complexes. We will present the detection of changes in this sense in relation to time series from multisensor data acquired in the visible (VIS), shortwave infrared (SWIR) and thermal infrared (TIR) spectral ranges of multispectral and hyperspectral scenes from satellite data (Sentinel 2, ASTER, ALI, Hyperion) and airborne sensor data (HyMAP, MASTER, AVIRIS, AHS) at different time periods. We also analyze time series data from active systems by applying differential radar interferometry to study ground deformation in relation to volcanic and seismic activity. Results for two study scenarios, Turrialba Volcano (located in Costa Rica and the La Palma Eruption in Spain that took place in 2021, are discussed.

Session: Seismology's Role in Assessing Volcanic Hazard at Multiple Time Scales [Poster]

Type: Poster

Date: 4/18/2023

Presentation Time: 08:00 AM (local time)

Presenting Author: María Belén Benito Oterino

Student Presenter: No

Invited Presentation: 

Authors