The launch of a new GVP website is scheduled for Monday, May 20, 2013.
Giggenbach submarine volcano viewed from the east in this aerial oblique view with two times vertical exaggeration. Depths range from 75 to 1600 meters in this image. The resolution of the bathymetry data is 25 meters. Giggenbach is ~30 kilometers northwest of the center of Macauley caldera. The bathymetry data are courtesy of the New Zealand National Institute of Water and Atmospheric Research (NIWA). Image courtesy of New Zealand-American Submarine Ring of Fire 2005 Exploration, NOAA Vents Program.
The new website is getting closer! Here's a screenshot.
AVO reported that on 13 May seismicity at Pavlof increased at 0800 commensurate with the presence of an intense thermal anomaly at the summit observed in satellite imagery. On 14 May pilot reports and satellite images confirmed activity; a spatter-fed lava flow advanced about 0.5 km down the N flank.
IG reported that although cloud cover often prevented observations of Tungurahua during 8-14 May, ash plumes were observed almost daily. Strombolian activity was observed on most nights ejecting blocks sometimes 500 m above the crater; blocks that fell onto the flanks rolled as far as 1 km. During 9-10 May lava fountains rose 700 m above the crater.
The Smithsonian's Global Volcanism Program seeks better understanding of all volcanoes through documenting their eruptions — small as well as large — during the past 10,000 years.