EPICENTRE

#2 · M3.6 · 4.5 km deep

TAP TO REPLAY THE WAVES

12 km WSW of Ralston, Oklahoma M3.6 · 4.5 km deep · 4 April 2018, 18:17 UTC Event data: USGS/ANSS · GeoNet (CC‑BY) · INGV (CC‑BY) · ISC Bulletin

This earthquake really happened.

See the official record ↗

A new earthquake tomorrow — , or play past days.

Logged, thank you — we read every one, and we can’t reply.

Stored so we can read it later — don’t include anything personal.

Sent, thank you — we read every one, and we can’t reply.

DRAG A TRACE TO MOVE THE WAVES

Station A

Station B

Station C

Station D

Station E

tap the map to drop your pin — this quake hit somewhere real, and you'll find out where after you lock in

How to play

Find the earthquake. No map, no place names — just recording stations and what they felt. A station knows how far the quake was, not which way: the wider the gap between its two shakes, the farther away. Tap the spot that fits every station.

Station A

Station B

Station C

Station A

Station B

Station C

Station A

Station B

Station C

Station A

Station B

Station C

Station A

Station B

Station C

Station A

Station B

Station C

TAP TO REPLAY

tap the map where you think it was

The real board below plays exactly like this one — but it gives you one guess, and a new earthquake every day. Practice here as often as you like.

Sound during the replay