Additional Report for La Lorenza

La Lorenza Mud Volcano

Colombia

Mud volcanoes do not form from deep-seated igneous processes and are normally excluded from volcanological compilations, but these distinctions are often lost on concerned neighbors and the press, as illustrated by the following reports from 1976. La Lorenza is on the Caribbean coast, 440 km N of Nevado del Ruiz, the nearest historically active volcano.


Index of Monthly Reports

Reports are organized chronologically and indexed below by Month/Year (Publication Volume:Number), and include a one-line summary. Click on the index link or scroll down to read the reports.

10/1976 (SEAN 01:13) Evacuation due to possible unconfirmed eruption

11/1976 (SEAN 01:14) Previously reported activity confirmed to be a mud volcano


Contents of Monthly Reports

All information contained in these reports is preliminary and subject to change.

10/1976 (SEAN 01:13) Evacuation due to possible unconfirmed eruption

A possible volcanic eruption began during the afternoon of 21 October 1976. Forty families were evacuated. No human casualties were reported, but 100 head of cattle have been killed and another 100 trapped by the activity. A lava flow was reported, but it should be noted that La Lorenza is on the Caribbean coast, in an area where mud volcanoes are common.

Information Contact: AFP.

11/1976 (SEAN 01:14) Previously reported activity confirmed to be a mud volcano

The possible eruption reported from La Lorenza was mud volcano activity, as suspected. At 0800 on 21 October, ambient-temperature gray mud was ejected. At 0900, the petroleum gases (largely methane) emitted by the mud volcano ignited, producing a flame several hundred meters high, which lasted for several days. Contrary to press reports, no lava was emitted. People and cattle fled the area, but there were no deaths. Some livestock were injured.

Information Contact: E. Ramirez, Univ. Javeriana, Bogotá.