M2.4 · 9 km WNW of The Geysers, CA

2026-08-25 00:22:31 UTC · 45.4 km (NNW) · depth 1.7 km

magnitude

2.4

distance

45.4 km

depth

1.7 km

envelope peak

27 µV

envelope SNR

9×

P predicted

7.8 s

sustain

3.7 s

low/high band

8.4×

vs NP.1835

1.30×

Listen for how the pitch balance changes at the P wave (marked where it was picked), at the S wave (the dashed mark is its predicted arrival) and through the coda that follows. Volume is normalised to this clip, so it only says how much energy there is before, during and after the event relative to its own peak — not how big the earthquake was.

• Peak 79 µV at 17:22 on a weekday afternoon, through the daytime traffic floor. The P onset landed on the predicted +9.0 s to within a sample.
• Recorded with the station’s original Python acquisition loop, a few hours before it was replaced by the C reader that now owns the digitizer.

Side by side with USGS NP.1835, 1.64 km away, both in ground velocity.

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