A seismic delay instrument
Before YouWould Feel It
The ground does not arrive all at once. Choose a real earthquake. Send its first and second waves toward anywhere on Earth.
A static USGS snapshot. Nothing is tracked. This is not an alert.
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ARRIVAL / YOUR MARKER
Tap anywhere on the map
or use your current location
01
Touch the map to choose where the waves should arrive.
Pfirst wave crossed the marker
Ssecond wave crossed the marker
elapsed
00:00
P arrival
—
waiting
S arrival
—
waiting
surface distance
—
time between
—
straight chord through a uniform EarthP 8.0 km/s · S 4.5 km/ssnapshot —