14) { $gdate = $gdate2; } if($ghr < 3) { $gdate = "$yester"."12"; } echo "\"Latest"; echo "\"Latest"; echo "\"Latest"; echo "\"Latest"; echo "\"Latest"; echo "\"Latest"; } ?> Global Sulfur Dioxide Monitoring Home Page "; echo ""; } ?>
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Global Sulfur Dioxide Monitoring Home Page


Each week, Smithsonian's Global Volcanism Program publishes a report of new volcanic activity.

The SO2 data collected by AURA/OMI and Suomi NPP/OMPS for the new activity this week are shown below.


Week of 15 - 21 Oct 2025


Central_America - Poas: OMI   NPP-OMPS   TROPOMI   N20-OMPS
Colombia - Purace, Reventador, Ruiz & Sangay: OMI   NPP-OMPS   TROPOMI   N20-OMPS
DRCongo - Nyamulagira & Nyiragongo: OMI   NPP-OMPS   TROPOMI   N20-OMPS
Halmahera - Dukono & Karangetang: OMI   NPP-OMPS   TROPOMI   N20-OMPS
Hawaii - Kilauea: OMI   NPP-OMPS   TROPOMI   N20-OMPS
Indonesia - Lewotobi: OMI   NPP-OMPS   TROPOMI   N20-OMPS
Italy - Etna: OMI   NPP-OMPS   TROPOMI   N20-OMPS
Japan - Sakurajima & Suwanosejima: OMI   NPP-OMPS   TROPOMI   N20-OMPS
Java - Semeru: OMI   NPP-OMPS   TROPOMI   N20-OMPS
Kamchatka - Klyuchevsky: OMI   NPP-OMPS   TROPOMI   N20-OMPS
Mexico - El Chichon & Popocatepetl: OMI   NPP-OMPS   TROPOMI   N20-OMPS
Papau New Guinea - Bagana, Langila & Manam: OMI   NPP-OMPS   TROPOMI   N20-OMPS
Philippine Islands - Kanlaon: OMI   NPP-OMPS   TROPOMI   N20-OMPS
South Sandwich Islands - Michael: OMI   NPP-OMPS   TROPOMI   N20-OMPS
Vanuatu - Aoba, Gaua & Yasur: OMI   NPP-OMPS   TROPOMI   N20-OMPS

Summary of Preliminary Tonnage estimates