Stromboli volcano, Aeolian Islands (Isole Eolie), Sicily, Italy -- Eruptive history (1985-1995)
| 1994 |
Figure 5-6: During the visit to the craters on 12 March 1994, the most intense activity took place deep within a pit at vent location 3/1. This pit is seen here during daylight from the southern rim of Crater 1. A few bombs can be distinguished in the lower central part of the pit.
Figure 5-7: The same bocca seen from the NE rim of Crater 3 on the evening of 10 March 1994. The lava fountain visible here was about 50 m high; others rose to about 120 m height. Acid vapors had destroyed my wide-angle zoom lens during the preceding hours so I had to use a 50 mm lens, failing to capture the full fountain.
Photomosaic of Crater 3, seen from S rim of Crater 1 on the morning of 12 March 1994. Locations of vents 3-1 and 3-2 are indicated. Note high SE rim of crater (at left) and large blocks of the October 1993 explosions lying around everywhere.
Fifteen minutes exposure by Marco Fulle of Stromboli erupting from four vents at about 0200 on 17 June 1994. A vertical fountain shoots up from vent 2 in Crater 1 while adjacent vent 1 (to the right) obliquely projects spatter onto the S and SE sides of Crater 1. Eruptions occur also from vents 1 and 2 in Crater 3 (left). The volcano enters a period of strongly increased activity. No cones are yet visible, pointing to rapid growth during the following two months (see the photos below).
Figure 5-8: Several vents erupting simultaneously in Crater 1 during the first hours of 22 August 1994, seen from Pizzo sopra la Fossa. Eruptions occur from the summit of the large central cone (vent location 1/2) and from a broader bocca on a lower cone at 1/1. Several smaller incandescent vents can be seen around the two fountaining ones. Height of fountains is about 50 m in this image.
Activity of Crater 1 on 22 August 1994.
Left: Spectacular continuous lava fountaining occurred from the new central cone of Crater 1 shortly after midnight on 22 August 1994, often lasting up to 90 minutes. Similar activity occurred from the broad glowing vent visible at the front base of the cone which was acting in a completely independent manner (i.e. both vents had individual periods of intensified fountaining or erratic expolsive behavior).
Right: Explosion from the broad vent just below the central cone on the forenoon of 22 August 1994. No activity is occurring from the summit vent of the cone in that moment, but erratic bursts of spatter were occurring in the same period (i.e. after 1000 h).
Eruption from vent 2 in Crater 3 at dawn, 22 August 1994. Broad lava fountains rise from three closely spaced vents in the center of the soutwestern depression of Crater 3. This eruption did not reach heights like others did, in the night before. Note shallowing of the craters.
Figure 5-9: Crater 1 seen from the northeast on the morning of 12 March 1994. The slope below the crater is covered with debris from the October 1993 explosions, and no traces of the May 1993 lava flows are visible. Note absence of cones within the crater.
Figure 5-10: Crater 1 seen from the northeast on the forenoon of 22 August 1994. A spectacular cluster of cones has grown since the last visit, and a small, very recent lava tongue (indicated by an arrow) extends down the N flank below the lowest point of the crater rim. New dark tephra covers the areas around the crater. Get comparison view of this and previous image (figs. 5-9 and 5-10) here . Still more detail of the lava flow is visible here .
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