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Table 7 Total number of strikes, percent of strikes, and number of strikes per year per 100 km2 by polarity and bioregion in California, 1997 through 2000.

From: Temporal and Spatial Distribution of Lightning Strikes in California in Relation to Large-Scale Weather Patterns

  Positive Negative
Bioregion Strikes % # yr−1 100−1 km−2 Strokes Strikes % # yr−1 100−1 km−2 Strokes Total strikes
North Coast 847 17.1 0.65 1.05 4 109 82.9 3.15 1.67 4 956
Klamath Mts. 1 118 10.6 1.24 1.08 9 468 89.4 10.50 1.63 10 586
Cascade Range 1 460 10.1 1.88 1.08 12 991 89.9 16.69 1.69 14 451
NE Plateaus 1 466 8.2 1.80 1.06 16 487 91.8 20.26 1.78 17 953
Sierra Nevada 6 369 10.6 2.37 1.09 53 849 89.4 20.07 1.92 60 218
Central Valley 2 044 10.7 0.90 1.11 7 844 79.3 3.47 1.71 9 888
Central Coast 773 11.4 0.50 1.10 6 025 88.6 3.91 1.76 6 798
South Coast 1 615 5.3 0.96 1.07 28 908 94.7 17.20 1.75 30 523
SE Deserts 7 344 3.8 1.67 1.08 187 130 96.2 42.57 1.88 194 474
Total 23 036 6.6 1.41 1.08 326 811 93.4 19.97 1.85 349 847