‘Explosion-like’ sounds in Kerala village due to cracking of rocks, not dangerous: KSDMA


PTI, Nov 1, 2024, 8:54 AM IST

Thiruvananthapuram: The “explosion-like” sounds, accompanied by tremors, that were heard in the Anakkallu area of Malappuram district a day ago, were apparently caused due to friction and cracking of rocks close to the surface of the earth, the Kerala State Disaster Management Authority (KSDMA) said on Thursday.

According to a joint statement issued by the KSDMA and the District Disaster Management Authority in Malappuram, District Geologist, Ground Water Department Geologist and District Hazard Analyst conducted a site inspection where the noise and vibrations occurred on October 17, 18 and 29.

Based on the inspection, the KSDMA concluded the noise and vibrations were “caused by the friction and cracking of rocks close to the surface of the earth” — a phenomena which has been reported in many parts of Kerala before — and were generally not dangerous.

This phenomenon is often caused by subtle natural changes in the earth. They are also caused by the displacement of rocks due to groundwater utilisation and when air contained in small cavities inside the earth escapes through tube wells, KSDMA said in the statement.

It said a decision has been taken to subject the site to a geophysical survey to understand the structure of the area more accurately and for that the Kozhikode NIT has been contacted by the KSDMA.

Regarding the damage suffered by some buildings due to the vibrations, it said that the same was due to their “age and structural weakness”.

The authority said that depending on the extent and pattern of the cracks suffered by the buildings, the damage can be repaired by an engineer for continued use.

Nearly 300 people were moved to safety after the “explosion-like” sounds accompanied by tremors were heard by them in Anakkallu area in Malappuram district on Tuesday night.

The first sound was reportedly heard at 9.15 pm on Tuesday, followed by two more at 10.15 pm and 10.45 pm along with mild tremors, and reportedly within a 2-km radius, causing panic among the local residents.

Local residents had said they heard alarming sounds similar to those heard from granite quarries at their place repeatedly accompanied by continuing tremors.

Cracks were also found to have developed in some houses in the area, they had said.

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