I seem to recall a paper linking water evap from rain and snow during drought in California effecting earthquakes there.
can't remember if it was frequency or amplitude....
ah..
https://www.csmonitor.com/Science/2014/0514/San-Andreas-Fault-Is-California-s-thirst-triggering-earthquakesChinese study reveals Three Gorges Dam triggered 3,000 earthquakes, numerous landslides
""This represents a 30-fold increase in frequency over the pre-dam period," according to Patricia Adams, executive director of Toronto-based Probe International and English editor of the translated study. "The earthquake activity especially increases when the dam operators rapidly increase or decrease the level of water in the reservoir."
Most of the quakes fell under 2.9 magnitude on the Richter scale, classifying them as "microseismic" tremors. One earthquake reached magnitude 4.1 on the Richter scale. It occurred as the dam authorities were attempting to fill the reservoir to its maximum height of 175 metres above sea level. Fan Xiao, chief engineer of the Sichuan Geology and Mineral Bureau, warns that "strong earthquakes could occur in the future as the reservoir fills because the microfractures, caused by the large number of microearthquakes, could make the area dangerously prone to a strong earthquake."
Large reservoirs are known to trigger earthquakes in a phenomenon called "Reservoir-induced Seismicity (RIS)." In a report of 19 dams in China that have suffered from RIS, 15 have geological conditions similar to Three Gorges."
https://www.geologypage.com/2018/11/oil-extraction-likely-triggered-mid-century-earthquakes-in-l-a.html