Every earthquake on the Palo Alto seismograph since its first day, October 26, 2019, newest first: within 124 miles, every earthquake down to a full magnitude under the marker curve whose record here an earthquake detector scores 0.05 or better, its largest swing no later than 20 seconds after the expected waves; beyond that, magnitude 4.1 at 200 miles, 5.2 at 1,000 and 6.9 at 10,000, only where the record's slow swings here rise to at least 2 times their level as the waves arrive. They are the earthquakes the seismograph marks on its plates, and each one here opens the plate its waves arrived on.