Kind of chilling to think about these tiny black holes. If they have enough gravitational pull to destabilize a white dwarf, I don't want to know what they'd do to our solar system.
A physics stack exchange answer about it: https://physics.stackexchange.com/a/55184
The most relevant part:
> The total energy created by a PBH roughly equals the energy produced by the detonation of one tonne of TNT, but this energy is the total energy it deposits along its path through the Earths diameter, not the energy it produces on impact. So don’t expect a magnificent explosion, we’d be lucky to see a spark as it hits the ground.
Two Seismic Events with the Properties for the Passage of Strange Quark Matter Through the Earth - http://www.geology.smu.edu/~dpa-www/sqm/pdf/sqm_lanl.pdf
It looks at pairs of seismic events that trace line through the earth and are timed correctly.
> Two sets of reports were found in the 1993 database that fit all the criteria for a linear source. The model and residuals (observed minus predicted arrival times) for the first event are given in Table 1. The RMS residual is 0.73 sec. This RMS value would indicate a good fit for a well-located earthquake.
A BBC article about the paper: http://news.bbc.co.uk/2/hi/science/nature/2502755.stm
PBS Spacetime - How Many Black Holes Are In The Solar System? https://youtu.be/wh75ubECL8I
And then How to spot tiny black holes that might pass through the solar system - https://www.sciencenews.org/article/primordial-black-holes-s...
That references two papers:
Probing primordial black holes and dark matter clumps in the Solar System with gravimeter and Global Navigation Satellite Systems networks - https://journals.aps.org/prd/abstract/10.1103/PhysRevD.110.0...
Close encounters of the primordial kind: A new observable for primordial black holes as dark matter - https://journals.aps.org/prd/abstract/10.1103/PhysRevD.110.0...