******************************************************** Summit activity at Mount Etna Istituto Nazionale di Geofisica e Vulcanologia – Sezione di Catania From: Sonia Calvari (calvari@xxxxxxxxxx) ******************************************************** On 15 August the South-East Crater (SEC) at the summit of Mount Etna started to produce ash emissions from the depression that cuts its eastern flank. The ash cloud was very diluted, rising for just a few tens of meters above the source, and quickly dispersed by the wind. Ash fallout has been observed only on the flanks of the SEC cone forming a deposit red in colour. On 21 August the summit web-camera of the Istituto Nazionale di Geofisica e Vulcanologia – Sezione di Catania (INGV-CT), (http://www.ct.ingv.it/Ufso/Default.asp? Pagina=vulcano.asp&Vulcano=Eev&Refresh=180) started to record at night some incandescent blocks erupted during the most energetic emissions, and a field survey carried out on 22 August showed a few most energetic events (about 20% of the total) associated to the ejection of hot, metric, lithic blocks fallen on the eastern flank of the cone. On 24 August the first short strombolian sequence has been recorded with a thermal camera from INGV researchers (M. Burton and G. Salerno) working on the summit. Strombolian explosions increased in intensity and became more common until today, 31 August, and this activity is slowly building up a cinder cone within the depression in the eastern flank of SEC. All INGV-CT reports (in Italian) with figures, photos and thermal images can be downloaded from the INGV-CT web page dedicated to updates on the eruptive activity of Mount Etna: http://www.ct.ingv.it/Default.asp?Pagina=./Etna2007/Report.asp. ------------------------------------------------------------------------ Dr. Sonia Calvari Istituto Nazionale di Geofisica e Vulcanologia Sezione di Catania Piazza Roma 2 95123 Catania (Italy) Tel. +39 095 7165800 direct: +39 095 7165862 Fax: +39 095 435801 url: www.ct.ingv.it ------------------------------------------------------------------------ ============================================================== To unsubscribe from the volcano list, send the message: signoff volcano to: listserv@xxxxxxx, or write to: volcano-request@xxxxxxxx To contribute to the volcano list, send your message to: volcano@xxxxxxxx Please do not send attachments. ==============================================================
