Ruby volcano, United States, Mariana Islands: news & activity updates

Ruby volcano (Mariana Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 20 September-26 September 2023 (New Activity / Unrest)

The US Geological Survey reported that no activity had been detected at Ruby in regional seismic and infrasound data or in satellite imagery since the 14-16 September submarine eruption. The plume of discolored water that had detached from the source vent on 16 September drifted E and dispersed; it was between Saipan and Anatahan during 21-22 September, faintly visible N and NNE of Saipan during 23-25 September, and no longer visible by 26 September. The Volcano Alert Level remained at Advisory (the second level on a four-level scale) and the Aviation Color Code remained at Yellow (the second level on a four-color scale). Read all

Ruby volcano (Mariana Islands, USA) - Smithsonian / USGS Weekly Volcanic Activity Report for 13 September-19 September 2023 (New Activity / Unrest)

The US Geological Survey reported that an eruption began at Ruby on 15 September. A submarine plume of discolored water was identified in satellite images at around 0650 but there was no activity above the water surface. Eruption signals began at 1427 on 15 September based on retrospective analysis of seismo-acoustic data from a geophysical monitoring station on Saipan, 50 km SE. Read all

Ruby volcano (Mariana Islands): new submarine explosion

The Northern Mariana Islands Volcano Observatory reported that a new submarine eruption appeared at the volcano on 15 September. Read all