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Report on Soufriere Guadeloupe (France) — June 1977

Natural Science Event Bulletin, vol. 2, no. 6 (June 1977)
Managing Editor: David Squires.

Soufriere Guadeloupe (France) Summary of seismicity since mid-1975

Please cite this report as:

Global Volcanism Program, 1977. Report on Soufriere Guadeloupe (France). In: Squires, D (ed.), Natural Science Event Bulletin, 2:6. Smithsonian Institution. https://doi.org/10.5479/si.GVP.NSEB197706-360060.

Volcano Profile |  Complete Bulletin


Soufriere Guadeloupe

France

16.044°N, 61.664°W; summit elev. 1467 m

All times are local (unless otherwise noted)


Table 6 summarizes seismicity at Soufrière from mid-1975 through May 1976.

Table 6. Total seismic energy release (x 1013 ergs) per 1/3-month period, July 1975-May 1977. Courtesy of M. Feuillard.

Month Days 01-10 Days 11-20 Days 21-end
Jul 1975 0 0 23
Aug 1975 0 0 0
Sep 1975 0 0 0
Oct 1975 0 0 1
Nov 1975 0 1 91
Dec 1975 0 0 14
Jan 1976 0 0 1
Feb 1976 1 7 5
Mar 1976 1 100 18000
Apr 1976 175 26 125
May 1976 35 150 4600
Jun 1976 380 88 64
Jul 1976 80 510 768
Aug 1976 1544 33831 20010
Sep 1976 1027 469 949
Oct 1976 446 532 930
Nov 1976 523 402 168
Dec 1976 225 165 41
Jan 1977 76 71 154
Feb 1977 152 38 33
Mar 1977 4 54 52
Apr 1977 2 7 1
May 1977 1 2 6

Further References. Feuillard, M., Allegre, C.J., Brandeis, G., Gaulon, R., and others, 1983, The 1975-1977 crisis of La Soufrière de Guadeloupe (F.W.I.): A still-born magmatic eruption: JVGR, v. 16, p. 317-334.

Geologic Background. La Soufrière de la Guadeloupe volcano occupies the southern end of Basse-Terre, the western half of the butterfly-shaped island of Guadeloupe. Construction of the Grand Découverte volcano about 0.2 million years ago (Ma) was followed by caldera formation after a plinian eruption about 0.1 Ma, and then by construction of the Carmichaël volcano within the caldera. Two episodes of edifice collapse and associated large debris avalanches formed the Carmichaël and Amic craters about 11,500 and 3100 years ago, respectively. The presently active La Soufrière volcano subsequently grew within the Amic crater. The summit consists of a flat-topped lava dome, and several other domes occur on the southern flanks. Most historical eruptions have originated from NW-SE-trending fissure systems that cut across the summit and upper flanks. A relatively minor phreatic eruption in 1976-77 caused severe economic disruption when Basse-Terre, the island's capital city, which lies immediately below the volcano, was evacuated.

Information Contacts: M. Feuillard, Lab. de Physique du Globe.