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Within three seconds, phones sensed the P-waves of the first quake, said Marc Stogaitis, a principal engineer at Google who works on the early warning system.—
Amy Graff,
New York Times,
27 June 2026 The system — based on the science behind P-waves — is designed to detect a P-wave and send alerts to your cell phone before the strongest shaking arrives.—
Monica Garske,
USA Today,
2 Feb. 2026 According to their analysis of the P-waves and S-waves detected by SEIS, there is water in the porous rock, filling the cracks and hollows between 6 and 12 miles (10 and 20 kilometers) deep.—
Keith Cooper,
Space.com,
17 Mar. 2025 Normally, the P-wave is followed a short time later with a narrow spike called the QRS complex.—
Angela Ryan Lee,
Verywell Health,
25 Sep. 2024