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09 May 1986 description


UNDRO 86/1102
COLOMBIA - VOLCANIC ERUPTION
UNDRO INFORMATION REPORT NO. 1
09 MAY 1986

SITUATION

1. RUIZ VOLCANO OBSERVATORY AT MANIZALES REGISTERED VOLCANIC TREMORS STARTING 22.00 ON 4 MAY 1986 AND RESUMING INTERMITTENTLY UNTIL 15.00 ON 8 MAY. STRONGEST TREMOR (3 ON RICHTER SCALE) WAS REGISTERED DURING 6 - 7 MAY.

2. HEAD OF NATIONAL EMERGENCY COMMITTEE VISITED AREA 8 MAY 1986 AND IT WAS DECIDED TO MAINTAIN ALERT STATUS UNTIL ACTIVITY DECLINED TO LEVEL REGISTERED DURING PAST TWO MONTHS BEFORE BEGINNING RECENT TREMORS.