News


2020-10-05

Color-coded scales and associated automatic email alerts

Color-codes are now assigned to the detected 'SO2 mass', 'thermal anomalies', and 'deformation std.dev', 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 valade@igeofisica.unam.mx to get more information and/or register.

2020-09-09

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1 DU + morphological filter, Valade et al. 2019) have been replaced by the L2-product flag "sulfurdioxide_detection_flag" developed by DLR-IMF (ref).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.

2020-08-05

New monitored volcano: Telica (Nicaragua).

2020-05-28

New monitored volcano: Ubinas (Peru).

2020-05-06

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).

2020-05-06

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.

2020-04-06

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".

2020-04-01

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).

2020-03-01

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

2020-02-10

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

2020-01-28

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.

2020-01-17

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