Earthquake diagrams. Map of wavepath from source to receiver, seismogram of vertical component of ground motion velocity and spectrogram showing frequency content against time.
P-waves from today’s (07:52:56 UTC 2026/04/20) M7.4 Near East Coast Honshu, Japan earthquake recorded on my @raspishake.bsky.social seismometer in Newcastle-under-Lyme, England. ⚒️🧪