hE? CHARLES DAVISON 
For many years past the most active zones have been those 
between the eastern and southern radii. But the seismic foci 
migrate from one zone to another without (at present) any apparent 
law. Take, for instance, the earthquakes of one year only, the 
year 1903.1 On January 30 there was a shock of intensity 5 at 
Giarre, Zafferana, Milo, Viagrande, Linguaglossa, and Randazzo 
(the epicenter being perhaps in zone 12); on March 8, one of 
intensity 4 between Nicolosi and Mascalucia, but hardly felt at 
either of these places although they are only 4 miles apart (zone 7); 
on March 11, one of the same intensity at S. Venerina (zone 10); 
on March 24, a very slight shock at Belpasso (zone 6); on April 3, 
a shock of intensity 5, and on April 4 and 5 very slight shocks at 
S. Venerina (zone 10); on April 7, a shock of intensity 5 at Lin- 
guaglossa and Milo (zone 1); on April 13, one of intensity 4 at 
Biancavilla (zone 4?); on April 19, a slight shock at Paterno 
(zone 5); on May 206, a very strong shock with slight damage at 
Trecastagni (zone 8), and only feebly felt at Viagrande, less than 
a mile away; on June 1, 14 shocks (2 of them of intensity 6) at 
Pedara and Viagrande; on June 3, 3 shocks at Viagrande; on 
June 5, 1 shock, and on June 7, 2 shocks, at Trecastagni and 
Viagrande; on June 11, a slight shock at Trecastagni; and on 
June 16, 2 very slight shocks at Viagrande (all 23 shocks in zone 8); 
on July 21, a very slight shock at Belpasso (zone 6); on July 30, 
a sensible shock at Biancavilla (zone 4?); on August 6, 4 shocks 
of intensity 4 at Nicolosi, Trecastagni, Zafferana, Milo, and Bian- 
cavilla (zone 7?); and, lastly, on November 20, a strong earth- 
quake of intensity 6 at Viagrande, Zafferana, Milo, S. Venerina, 
Acireale, and Linguaglossa (zone 10). Thus, seven out of the 
twelve Etnean zones were probably in action in this one year. 
3. MONTE EPOMEO (ISCHIA) 
The island of Ischia, 6 miles long from east to west and 5 miles 
in width, is separated from the Italian coast by a distance of 
only 6 miles. A large part of the island is occupied by the old 
crater of Monte Epomeo, a volcano which must be regarded as 
dormant rather than extinct, for the last eruption occurred in 
1S. Arcidiacono, Bull. dell’ Accad. Gioenia di Sci. Nat. in Catania, Fasc. 79 (1903). 
