With transiting Saturn now returned to '17 Virgo' I wasn't surprised that a rerun of Krakatoa was shown this week on PBS but now this amazing must-see photo has been taken from the ISS:
Space Weather News for June 26, 2009
VOLCANIC VISTAS: On June 12th, astronauts onboard the International Space Station watched in amazement as Russia's Sarychev Peak volcano erupted directly beneath their spacecraft. The rare photo they took is a must-see.
An enormous sulfur dioxide plume from the eruption is now circumnavigating the globe at northern latitudes, producing spectacular sunsets for international air travelers.
Today's edition of SpaceWeather News features 3D photos of the eruption from space, satellite movies of the sulfur dioxide plume, and a Mars-like view of the volcanic cloud over the Canadian Arctic. #
Krakatoa's 2nd eruption came on August 27, 1883, and 1/3 of the earth's inhabitants heard it! The tsunami it caused you don't want to know about as most of the Indonesian island disappeared under the waves.
Saturn on August 27, 1883 was at '10 Gemini' along with Pluto (1:13) and Chiron (3:32); in Virgo were Sun (3Vir+), Uranus, and Mercury. Watery Neptune was Rx at '22 Taurus', an earth sign, and Mars 2Can+ was conjoined by the Moon.
So as far as '17 Virgo' goes, Mercury and Uranus would have been the last planetary culprits to trigger the "Volcano in Eruption" degree of the Sabian Symbols. This is certainly not conclusive for timing volcanic explosions by Astrology, I'm just noting the '17 Virgo' degree's volcanic symbolism along with Saturn's representation of Earth, soil, tectonic plates, rocks, and other geological factors.
"A Volcano in Eruption"...EXPLOSION...
positive: creative passion as a rejection of superficiality and a genius for ordering of self;
negative/unconscious/shadow side: petulance and tantrums. (Marc Edmund Jones,The Sabian Symbols in Astrology.)
Dane Rudhyar in his An Astrological Mandala gives the Keynote of this degree as:
The explosive energy of long-repressed contents of the subconscious.