Valid points; caution is necessary.
it does seem that the villagers there did
connect the dots, so to speak, and assume
that a fireball that they saw, with a possible
impact explosion, resulted in the crater.
As far as a 66ft wide crater?
It looks deep...possibly indicating that the meteorite
is submerged under that poisoned water.
As far as explosions and seismic signals?
A 500 Ib charge of TNT will create a 20ft wide crater.
Scale that up...[66/20]^3 x 500Ibs = (roughly) 9 tons of TNT.
Soil and bedrock strength is also a variable.
Nine tons of TNT would produce a big blast, but hardly
anything seismologists would note well over 100 miles away; especially
if the nearby ground had plentiful water soaked in, absorbing seismic energy.