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Etna Decade Volcano, Sicily, Italy

Maps

This is the moment when you may finally get an idea of the topography of Etna, the distribution of lava flows between 1971 and 1993 and earlier, and the location of towns and villages around the volcano. Below you will see the first in a series of maps that will get you acquainted with the location of the volcano and its surroundings. You may also visit the web site of the Province of Catania (in Italian language) that has a map of all of its towns and Etna (you may "virtually visit" all towns on the map).

Etna's lava flows

Map showing selected historical lava flows

This map is not the definite map of all historical lava flows of Etna. It shows a selection of lava flows in order to emphasize the location of eruptive vents, the main courses taken by lava flows in the past few centuries, and the hazards related to lava emission on Etna. The oldest flows shown are of 1381 (?), 1614-1624, and 1669. Virtually all lava flows erupted since the beginning of the 18th century are shown where the boundaries and emplacement date are beyond doubt. The full size version of the map shows the entire area covered by Etnean volcanics, towns, railroads and the highway (Messina-Catania). The density of flows especially in the summit area and in Valle del Bove does not allow the eruption dates to be included in this map, but a set of thematic maps (e.g., flows of the 18th century, flows of the 19th century, flows from 1900 until 1971 and 1971 to present) will soon be available and help you recognize the ages of the flow shown here.

Etna's lava flows

Map showing cinder cones from flank eruptions

This is the first in a set of thematic maps showing particular features of Etna. Here you see the locations of the cinder cones produced by the flank eruptions of the volcano, and some cones to which reference is made more often are highlighted in red color. This map has the same scale as the lava flow map shown above, but the small version shows only the summit area and its immediate surroundings.


ERUPTIONS OF 1381(?) AND 1669 (ATTENTION: 660 k jpg)
Please note that the brown-colored patches in the lower left corner and near Catania and Acireale-Acicastello (which are not labeled in the legend) correspond to the sedimentary basement of Etna.

This map clearly illustrates the hazard from eruptions at low altitude in the southern and southeastern sectors of Etna. Two clusters of cinder cones and eruptive fissures can be distinguished: one between about 1100 and 2300 m on the southern flank, and the other between about 500 and 900 m elevation on the SSE flank. Note that the cones are larger and tend to be more isolated in the lower cluster. The largest, and youngest, of these cones is called Monti Rossi (the plural form of "Monte" has been applied for the twin peaks on the eastern and western crater rims), it was built during the eruption of March-July 1669 which ranks among the most voluminous and devastating Etnean eruptions during historical time. The 1669 lava flows reached a length of more than 15 km and entered the Ionian Sea south of Catania. It furthermore surrounded the Castello Ursino, a medieval fortress located on the shoreline at the southern margin of Catania (note its location, marked with an "U", with respect to the post-1669 coastline), and a small branch of lava (to the left of "U" in the map) broke through the city wall on the western side of Catania. Although it is commonly reported that the city was virtually buried under the lava, this information is false, and neither were there any victims. On its path, however, the lava flow which was split into three main lobes buried sixteen villages and damaged others.
Another historical lava flow is shown on the map, commonly ascribed to an eruption in 1381 which broke out at only 350-500 m elevation near the town of Mascalucia. Based on paleomagnetic data, Tanguy (1981) and Tanguy & Kieffer (1993) state that the flow is about 200 years older (12th century), and the date 1381 is therefore given with a question mark on the map. The flow from this eruption miraculously bypassed the major population centers of that era and arrived at the Ionian Sea to the north of Catania.
Both the 1669 and 1381(?) flows are now in large part covered by the city of Catania and smaller towns right up to their sources. The eruptive fissure of the 1381(?) eruption, named "Cav˛li", has in recent years been buried almost beyond recognition by extensive areas of private homes and fruit gardens. Were an eruption similar to the 1669 and 1381(?) eruptions to occur today, it would have far more devastating events than those events, because there is practically no undeveloped space left.
The topography of this map is based on RasÓ et al. (1982) while the flow outlines and locations of cinder cones are after the Geological Map of Mount Etna of Romano et al. (1979). There are other historical lava flows in the map area, but they have been omitted for two reasons. 1. Flows younger than 1669 are not included to highlight the 1669 and 1381(?) lavas. 2. The outlines and ages of flows older than 1669, except the 1381(?) flow, are poorly constrained. Also, no cinder cones or fissure vents younger than 1669 are included.

Click on the map to get a high-resolution version (ATTENTION: 200 k jpg)
Please note that the brown-colored patches in the right part of the map correspond to the sedimentary basement of Etna.

The only Etnean eruption in recent times to destroy an entire village occurred in November 1928 on the ENE flank. It occurred in a sector rarely affected by eruptions in historical times and was evidently strongly controlled by regional tectonics (the main flow erupted from a normal fault that created a morphologic "step" known as the "Ripe della Naca"). As in other Etnean eruptions, the 1928 fissures started to open high on the mountain, in the Valle del Leone - which ist the northwesternmost part of Valle del Bove - and progressively lengthened downslope across the north rim of the Valle to about 1050 m elevation. The first sign of the eruption was a series of powerful explosions from NE Crater on the afternoon of 2 November. Then, three groups of vents formed, one in Valle del Leone (not shown on the map), the second above the Serra delle Concazze on the northern rim of Valle del Bove, and the third at the "Ripe della Naca". The first group produced only small lava flows and became extinct after few hours while the second group emitted a vigorous lava flow which rapidly advanced in the direction of the villages Sant'Alfio, Fornazzo and Milo; however, this latter group ceased its activity on the second day of the eruption. The third fissure segment produced spectacular lava cascades down the steep slope of the "Ripe della Naca" which at its base reunited and began a merciless advance towards Mascali which lay directy in its path. Four days after the beginning of the eruption the lava began to consume the first houses of the town, and a few days later, Mascali was erased from the maps, its inhabitants rendered homeless (like in 1669, there were no victims although some sources say up to five people were killed), and major roads and railroads were interrupted.
The map shows the extent of the lava flows from the two lower fissure segments and various towns and other points of reference. Topography and flow outlines have been drawn after the same sources as the 1669-1381(?) map. Outlines of the summit craters are as they appear in early 1999; the location of the rebuilt town of Mascali is indicated.

Click here for more on the 1928 eruption

Maps of lava flow erupted between 1971 and 1993 are available on a separate page. For preliminary maps of the most recently erupted lavas go to the Etna News Page.


Page set up on 12 March 1999

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