Shasta County Natural Disasters and Weather Extremes
The chance of earthquake damage in Shasta County is much lower than California average and is higher than the national average. The risk of tornado damage in Shasta County is lower than California average and is much lower than the national average.
Earthquake Index, #46
| Shasta County | 3.01 |
| California | 21.80 |
| U.S. | 1.81 |
The earthquake index value is calculated based on historical earthquake events data using USA.com algorithms. It is an indicator of the earthquake level in a region. A higher earthquake index value means a higher chance of an earthquake.
Volcano Index, #3
| Shasta County | 0.1349 |
| California | 0.0068 |
| U.S. | 0.0023 |
The volcano index value is calculated based on the currently known volcanoes using USA.com algorithms. It is an indicator of the possibility of a region being affected by a possible volcano eruption. A higher volcano index value means a higher chance of being affected.
Tornado Index, #50
| Shasta County | 1.38 |
| California | 18.56 |
| U.S. | 136.45 |
The tornado index value is calculated based on historical tornado events data using USA.com algorithms. It is an indicator of the tornado level in a region. A higher tornado index value means a higher chance of tornado events.
Other Weather Extremes Events
A total of 391 other weather extremes events within 50 miles of Shasta County were recorded from 1950 to 2010. The following is a break down of these events:
| Type | Count | Type | Count | Type | Count | Type | Count | Type | Count |
| Avalanche: | 0 | Blizzard: | 0 | Cold: | 0 | Dense Fog: | 2 | Drought: | 0 |
| Dust Storm: | 0 | Flood: | 40 | Hail: | 90 | Heat: | 0 | Heavy Snow: | 17 |
| High Surf: | 0 | Hurricane: | 0 | Ice Storm: | 0 | Landslide: | 0 | Strong Wind: | 21 |
| Thunderstorm Winds: | 35 | Tropical Storm: | 0 | Wildfire: | 35 | Winter Storm: | 43 | Winter Weather: | 1 |
| Other: | 107 | ||||||||
Volcanos Nearby
A total of 10 volcanoes are found in or near Shasta County.
| Distance (miles) | Name | Region | Latitude | Longitude | Elevation (foot) | Type | Status | Last Eruption |
| 23.2 | Twin Buttes | US-California, United States | 40.78 | -121.6 | 1631 | Cinder cone | Holocene | Unknown |
| 26.4 | Tumble Buttes | US-California, United States | 40.68 | -121.55 | 2191 | Cinder cone | Holocene | Unknown |
| 33.4 | Potato Butte | US-California, United States | 40.63 | -121.43 | 1532 | Shield volcano | Holocene | Unknown |
| 33.6 | Lassen Volc Center | US-California, United States | 40.492 | -121.508 | 3187 | Stratovolcano | Historical | Last known eruption 1900-1963 |
| 37.9 | Big Cave | US-California, United States | 40.955 | -121.365 | 1259 | Shield volcano | Holocene | Unknown |
| 42.6 | Brushy Butte | US-California, United States | 41.178 | -121.443 | 1174 | Shield volcano | Holocene | Unknown |
| 46.3 | Shasta | US-California, United States | 41.42 | -122.2 | 4317 | Stratovolcano | Historical | Last known eruption 1700-1799 |
| 61.7 | Medicine Lake | US-California, United States | 41.58 | -121.57 | 2412 | Shield volcano | Radiocarbon | Last known eruption A.D. 1-1499 |
| 64.2 | Eagle Lake Field | US-California, United States | 40.63 | -120.83 | 1652 | Fissure vent | Holocene | Unknown |
| 124.0 | Imagination Peak | US-Oregon, United States | 42.552 | -122.201 | 1986 | Pyroclastic cone | Holocene | Unknown |
Historical Earthquake Events
A total of 23 historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Shasta County.
| Distance (miles) | Date | Magnitude | Depth (km) | Latitude | Longitude |
| 30.7 | 1940-02-08 | 6 | N/A | 40.4 | -121.7 |
| 36.9 | 1950-03-20 | 5.5 | N/A | 40.45 | -121.47 |
| 44.2 | 1945-05-02 | 5 | N/A | 41.3 | -122.5 |
| 48.4 | 1978-08-01 | 4.6 | 2 | 41.45 | -121.88 |
| 38.1 | 1974-01-06 | 4.5 | 5 | 41.12 | -121.49 |
| 31.0 | 1982-06-21 | 4.3 | 11 | 41.2 | -121.92 |
| 46.9 | 1978-08-13 | 4.3 | 2 | 41.43 | -121.89 |
| 32.2 | 1969-03-28 | 4.2 | N/A | 41.04 | -121.55 |
| 49.0 | 1978-10-05 | 4.2 | 2 | 41.46 | -121.88 |
| 33.7 | 1950-11-14 | 4.1 | N/A | 40.5 | -121.5 |
| 24.2 | 1970-06-13 | 4 | 3 | 40.92 | -121.63 |
| 34.4 | 1950-11-14 | 4 | N/A | 40.48 | -121.5 |
| 32.6 | 1969-03-28 | 3.8 | N/A | 41.05 | -121.55 |
| 49.2 | 1978-06-12 | 3.8 | 2 | 41.46 | -121.86 |
| 49.6 | 1950-01-16 | 3.8 | N/A | 40.25 | -121.38 |
| 17.1 | 1977-05-31 | 3.7 | 15 | 40.88 | -122.33 |
| 18.8 | 1977-01-13 | 3.7 | 2 | 41.02 | -122.15 |
| 33.9 | 1965-12-20 | 3.7 | N/A | 40.7 | -121.4 |
| 38.6 | 1971-12-13 | 3.6 | 2 | 40.36 | -121.53 |
| 2.7 | 1950-02-09 | 3.5 | N/A | 40.8 | -122.05 |
| 12.0 | 1976-09-01 | 3.5 | 5 | 40.64 | -122.21 |
| 45.9 | 1941-11-06 | 3.5 | 16 | 40.83 | -121.17 |
| 47.6 | 1978-06-11 | 3.5 | 2 | 41.44 | -121.89 |
Historical Tornado Events
A total of 1 historical tornado event that had recorded magnitude of 2 or above found in or near Shasta County.
| Distance (miles) | Date | Magnitude | Start Lat/Log | End Lat/Log | Length | Width | Fatalities | Injuries | Property Damage | Crop Damage | Affected County |
| 44.2 | 1980-05-09 | 2 | 40°08'N / 122°13'W | 0.10 Mile | 3 Yards | 0 | 0 | 25K | 0 | Tehama |
* The information on this page is based on the global volcano database, the U.S. earthquake database of 1638-1985, and the U.S. Tornado and Weather Extremes database of 1950-2010.