Color-coded scales and associated automatic email alerts

Color-codes are now assigned to the detected 'SO2 mass', 'thermal anomalies', and 'deformation', and are reflected in the home-page table. Automatic email alerts are sent to specified users, which are customized based on the desired alert-type, alert-level, and volcano of interest. Contact to get more information and/or register.


Improved SO2 detection

(1) The filters used to detect SO2 contaminated pixels (concentration >1 DU + morphological filter, Valade et al. 2019) have been replaced by the L2-product flag "sulfurdioxide_detection_flag" developed by DLR-IMF (ref). This flag identifies pixels with a concentration >0.35 DU, and takes into account whether neighboring pixels also fulfill this criterion in order to minimize false-positive detections. This now allows MOUNTS to detect smaller SO2 plumes.

(2) The SO2 mass detected in a 500x500 km box centered on the volcano is now attributed to the volcano only if SO2 is also detected in a 100x100 box around the volcano. This now allows MOUNTS to minimize false-detections due to SO2 emissions by neighboring volcanoes.

These upgrades are now operational, and re-processing of the archive dataset is ongoing.


New monitored volcano: Telica (Nicaragua).


New monitored volcano: Ubinas (Peru).


Sentinel-2 images are now also displayed as true color images (visible bands B4-B3-B2, 10m resolution), with hot pixels enhanced using SWIR infrared bands B12-B11-B8A (20m resolution).


New feature in timeseries webpage: the various image types are now easily changeable using radio-buttons displayed on the left side of the image (e.g., Sentinel-2 image types: 'visible + infrared', 'infrared', 'infrared + detection'). These can also be changed in the "page options" menu.


New timeseries webpage: the page has been restructured to display parameters derived from the analysis of Sentinel-1 (deformation, coherence, intensity), Sentinel-2 (hotspots) and Sentinel-5P (SO2) products in distinct subplots, together with images associated to each timeseries. The old page version is still accessible from the "page options" menu, following the link "collapsed timeseries".


New products available: images are now also plotted on a "zoomed" crop around the volcano summit (2x2 km for Sentinel-1 & 2 images, 100x100 km for Sentinel-5P images).


New monitored volcanoes: Nevado del Ruiz (Colombia), Villarrica (Chile), Masaya & Momotombo (Nicaragua), Ibu (Indonesia), Sakurajima (Japan).


Sentinel-1 SAR intensity images are now also displayed after speckle-filtering (CNN-based speckle filter: Davis et al. 2020, IGARSS).


New monitored volcano: Michoacan-Guanajuato volcanic field (Mexico), in response to the seismic crisis initiated early January 2020. Real-time monitoring ended on 2020-03-06 following a significant decrease in seismic activity.


New monitored volcano: Taal (Philippines), in response to the eruptive crisis started early January 2020.