Ground signals
Easy · Original draft · Review pending · Criss-cross style
Ground signals
Eight clues about earthquake origins, measurements and effects.
Quake triggered after a mainshock in the same general area (10)
Arrows move · Space changes direction · Enter selects the next clue
Across→
Down↓
About this earthquake crossword
Four Across answers meet four Down answers about earthquake origins, recordings, measurements and effects in a 12×11 criss-cross. Some clues distinguish a rupture starting point from the surface point above it, or overall earthquake size from shaking at one location. The surface-location answer uses US spelling. Its printable answer key matches this standalone practice grid.
12 × 11 grid · 8 clues · Criss-cross style
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Ground signals
Easy · 12 × 11 · ClueFill · Unreviewed original draft
Across
1. Quake triggered after a mainshock in the same general area (10)
6. Trace recorded as seismic waves pass a station (10)
7. Wave series caused by a sudden large displacement of seawater (7)
8. Surface point directly above where an earthquake starts (9)
Down
2. Underground point where an earthquake rupture begins (5)
3. Rating of shaking effects at a particular location (9)
4. Earthquake-size value estimated from seismic measurements (9)
5. Rock break marked by movement between its sides (5)