Trinity County Natural Disasters and Weather Extremes
The chance of earthquake damage in Trinity County is much lower than California average and is higher than the national average. The risk of tornado damage in Trinity County is lower than California average and is much lower than the national average.
Earthquake Index, #47
| Trinity County | 2.94 |
| 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, #20
| Trinity County | 0.0074 |
| 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, #55
| Trinity County | 0.57 |
| 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 356 other weather extremes events within 50 miles of Trinity 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: | 33 | Hail: | 68 | Heat: | 0 | Heavy Snow: | 17 |
| High Surf: | 0 | Hurricane: | 0 | Ice Storm: | 0 | Landslide: | 0 | Strong Wind: | 22 |
| Thunderstorm Winds: | 37 | Tropical Storm: | 0 | Wildfire: | 33 | Winter Storm: | 42 | Winter Weather: | 1 |
| Other: | 101 | ||||||||
Volcanos Nearby
A total of 9 volcanoes are found in or near Trinity County.
| Distance (miles) | Name | Region | Latitude | Longitude | Elevation (foot) | Type | Status | Last Eruption |
| 71.5 | Shasta | US-California, United States | 41.42 | -122.2 | 4317 | Stratovolcano | Historical | Last known eruption 1700-1799 |
| 79.8 | Twin Buttes | US-California, United States | 40.78 | -121.6 | 1631 | Cinder cone | Holocene | Unknown |
| 82.0 | Tumble Buttes | US-California, United States | 40.68 | -121.55 | 2191 | Cinder cone | Holocene | Unknown |
| 84.9 | Lassen Volc Center | US-California, United States | 40.492 | -121.508 | 3187 | Stratovolcano | Historical | Last known eruption 1900-1963 |
| 88.3 | Potato Butte | US-California, United States | 40.63 | -121.43 | 1532 | Shield volcano | Holocene | Unknown |
| 93.9 | Big Cave | US-California, United States | 40.955 | -121.365 | 1259 | Shield volcano | Holocene | Unknown |
| 94.6 | Brushy Butte | US-California, United States | 41.178 | -121.443 | 1174 | Shield volcano | Holocene | Unknown |
| 102.9 | Medicine Lake | US-California, United States | 41.58 | -121.57 | 2412 | Shield volcano | Radiocarbon | Last known eruption A.D. 1-1499 |
| 117.3 | Clear Lake | US-California, United States | 38.97 | -122.77 | 1439 | Volcanic field | Holocene | Undated, but probable Holocene eruption |
Historical Earthquake Events
A total of 21 historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Trinity County.
| Distance (miles) | Date | Magnitude | Depth (km) | Latitude | Longitude |
| 47.6 | 1931-09-09 | 5.8 | N/A | 40.5 | -124 |
| 39.5 | 1977-07-12 | 5 | 20 | 40.28 | -123.69 |
| 46.4 | 1977-06-07 | 4.6 | 28 | 41 | -123.87 |
| 39.8 | 1969-10-22 | 4.4 | N/A | 40.4 | -123.8 |
| 41.5 | 1977-04-02 | 4.4 | 14 | 40.57 | -123.9 |
| 38.0 | 1980-10-13 | 4.3 | 20 | 40.43 | -123.78 |
| 35.2 | 1969-12-14 | 4.2 | N/A | 40.4 | -123.7 |
| 24.0 | 1967-02-25 | 4.1 | N/A | 40.3 | -123.1 |
| 36.4 | 1970-08-19 | 4.1 | 7 | 40.2 | -122.75 |
| 24.3 | 1971-04-19 | 3.8 | 2 | 40.82 | -123.52 |
| 46.2 | 1970-03-12 | 3.8 | 12 | 40.46 | -123.96 |
| 47.8 | 1961-11-09 | 3.8 | N/A | 40.43 | -123.98 |
| 27.0 | 1978-09-22 | 3.7 | 20 | 40.63 | -123.63 |
| 33.6 | 1985-09-02 | 3.7 | 24 | 40.58 | -123.75 |
| 39.6 | 1985-11-23 | 3.7 | 19 | 40.26 | -123.67 |
| 44.0 | 1977-05-31 | 3.7 | 15 | 40.88 | -122.33 |
| 25.7 | 1966-07-03 | 3.6 | N/A | 40.6 | -123.6 |
| 45.3 | 1958-06-11 | 3.6 | N/A | 40.65 | -123.98 |
| 38.3 | 1977-07-12 | 3.5 | 21 | 40.28 | -123.66 |
| 40.6 | 1954-12-22 | 3.5 | N/A | 40.78 | -123.87 |
| 47.4 | 1976-09-01 | 3.5 | 5 | 40.64 | -122.21 |
Historical Tornado Events
No historical tornado events that had recorded magnitudes of 2 or above found in or near Trinity County.
No historical earthquake events found in or near Trinity County.
* 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.