The energy being released in these many tiny earthquakes was always going to exist in this location. Much better to release it slowly via thousands of tiny earthquakes than all at once. Better to have 10k magnitude 3 quakes than one magnitude 7.
It's logarithmic so you'd need more like 30,000 magnitude 3 earthquakes to equal the energy of a magnitude 7. I don't think it's clear this is better. You can also make the argument that this may trigger the large earthquake that might not have happened for a long time.
Energy is logarithmic with magnitude, but if the underlying model is analogous to springs being loaded and suddenly released, that model is quadratic in energy with distance.
The article cites 1399 detectable follow-on earthquakes. If each of them represented a movement of earth an equal distance as compared to a single event, each of those movements would be 1/1399th in scale and therefore ~5x10^-7 in energy per event. (One two-millionth.)
margalabargala · · focus · HN ↗
The energy being released in these many tiny earthquakes was always going to exist in this location. Much better to release it slowly via thousands of tiny earthquakes than all at once. Better to have 10k magnitude 3 quakes than one magnitude 7.
booi · · focus · HN ↗
MBCook · · focus · HN ↗
sokoloff · · focus · HN ↗
The article cites 1399 detectable follow-on earthquakes. If each of them represented a movement of earth an equal distance as compared to a single event, each of those movements would be 1/1399th in scale and therefore ~5x10^-7 in energy per event. (One two-millionth.)
I think that's clearly better.