| Feature on earth's crust in California (3,7,5) |
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| Californian quake cause, commonly (3,7,5) |
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| Californian geological fracture (3,7,5) |
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| Fracture forming the tectonic boundary between the Pacific and North American Plates (3,7,5) |
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| Major fracture in Earth's crust in Western California (3,7,5) |
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| Cause of many California earthquakes |
New York Times |
05 Dec 2022 |
| *Source of much West Coast friction |
Wall Street Journal |
30 Aug 2022 |
| Digger initially going in faster, as annual repairs concerning underground line? |
The Telegraph Cryptic |
17 Nov 2019 |
| Climbing nuts endlessly imagine San Francisco's peaks, days away from explicit source of its instability? |
The Telegraph Toughie |
03 Aug 2018 |
| Tennis player's least favorite geological feature? |
USA Today |
14 Jul 2016 |
| Tennis player's least favorite geological feature? |
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| It may tear LA asunder fast — a Californian's conclusion |
The Times Cryptic |
25 Aug 2015 |
| In Wild West, St Andrew gets most of 8 across - it's groundbreaking stuff |
Irish Times Crosaire |
23 Jun 2015 |
| Safe natural sand is moving in area of instability |
The Times Cryptic |
02 Feb 2015 |
| California woman's imperfection? |
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| Site of slippage ... both geographically and in this puzzle |
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| Culprit in California quakes |
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| Source of some large-scale shaking |
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| Carrizo Plain peril |
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| Woman's imperfection? |
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| Source of some serious shaking |
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| Locale for a 17-Across |
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