More Crap From Space Alert!
The BBC asks Did quark matter strike Earth?:

A group of researchers have identified two seismic events that they think provide the first evidence of a previously undetected form of matter passing through the Earth.

The so-called strange quark matter is so dense that a piece the size of a human cell would weigh a tonne.

The two events under study both took place in 1993.
...
One event occurred on 22 October, 1993, when, according to the researchers, something entered the Earth off Antarctica and left it south of India 0.73 of a second later.

The other occurred on 24 November, 1993, when an object entered south of Australia and exited the Earth near Antarctica 0.15 of a second later.
...
He calculated that strange quark particles would dash through Earth with dramatic effect: a one-tonne spec would release the energy of a 50-kilotonne nuclear bomb, spread along its entire path through the Earth.

Even spread out, that could put a crimp in your day!