USA.com / California / Ventura County / Santa Rosa Valley, CA / Natural Disasters and Weather Extremes
Santa Rosa Valley, CA Natural Disasters and Weather Extremes
Hot Rankings
The chance of earthquake damage in Santa Rosa Valley is much lower than California average and is much higher than the national average. The risk of tornado damage in Santa Rosa Valley is about the same as California average and is much lower than the national average.
Earthquake Index, #782
| Santa Rosa Valley, CA | 9.51 |
| 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, #1308
| Santa Rosa Valley, CA | 0.0000 |
| 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, #708
| Santa Rosa Valley, CA | 12.65 |
| 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 282 other weather extremes events within 50 miles of Santa Rosa Valley, CA 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: | 2 | Dense Fog: | 0 | Drought: | 0 |
| Dust Storm: | 0 | Flood: | 117 | Hail: | 20 | Heat: | 0 | Heavy Snow: | 0 |
| High Surf: | 1 | Hurricane: | 0 | Ice Storm: | 0 | Landslide: | 0 | Strong Wind: | 7 |
| Thunderstorm Winds: | 26 | Tropical Storm: | 0 | Wildfire: | 30 | Winter Storm: | 0 | Winter Weather: | 0 |
| Other: | 79 | ||||||||
Volcanos Nearby
No volcano is found in or near Santa Rosa Valley, CA.
Historical Earthquake Events
A total of 189 historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Santa Rosa Valley, CA.
| Distance (miles) | Date | Magnitude | Depth (km) | Latitude | Longitude |
| 30.8 | 1971-02-09 | 6.4 | 8 | 34.41 | -118.4 |
| 45.2 | 1916-10-23 | 6 | N/A | 34.9 | -118.9 |
| 11.5 | 1973-02-21 | 5.9 | 8 | 34.1 | -119 |
| 39.1 | 1941-07-01 | 5.9 | 16 | 34.33 | -119.58 |
| 47.4 | 1978-08-13 | 5.7 | 12 | 34.37 | -119.72 |
| 49.3 | 1941-11-14 | 5.4 | 16 | 33.78 | -118.25 |
| 29.5 | 1930-08-31 | 5.3 | N/A | 33.9 | -118.6 |
| 30.8 | 1971-02-09 | 5.3 | 8 | 34.41 | -118.4 |
| 41.5 | 1981-09-04 | 5.3 | 5 | 33.67 | -119.11 |
| 26.2 | 1971-02-09 | 5.2 | 6 | 34.31 | -118.45 |
| 43.2 | 1941-09-21 | 5.2 | 16 | 34.87 | -118.93 |
| 43.2 | 1941-09-21 | 5.2 | 16 | 34.87 | -118.87 |
| 44.2 | 1941-09-21 | 5.2 | 16 | 34.87 | -118.73 |
| 46.4 | 1968-07-05 | 5.2 | N/A | 34.12 | -119.7 |
| 24.0 | 1979-01-01 | 5.1 | 11 | 33.95 | -118.68 |
| 42.7 | 1952-08-23 | 5 | N/A | 34.5 | -118.22 |
| 47.5 | 1961-11-15 | 5 | N/A | 34.93 | -118.98 |
| 47.5 | 1963-03-01 | 5 | N/A | 34.93 | -118.98 |
| 48.9 | 1941-10-22 | 4.9 | 16 | 33.82 | -118.22 |
| 26.4 | 1977-08-12 | 4.8 | 10 | 34.38 | -118.47 |
| 33.3 | 1971-02-09 | 4.8 | 14 | 34.34 | -118.33 |
| 40.9 | 1954-08-26 | 4.8 | N/A | 33.92 | -119.5 |
| 16.0 | 1948-04-16 | 4.7 | 16 | 34.02 | -118.97 |
| 18.3 | 1957-03-18 | 4.7 | N/A | 34.1 | -119.17 |
| 27.8 | 1950-02-26 | 4.7 | 16 | 34.62 | -119.08 |
| 28.4 | 1971-02-21 | 4.7 | 7 | 34.4 | -118.44 |
| 33.7 | 1958-07-14 | 4.7 | 16 | 34.35 | -119.48 |
| 38.1 | 1973-08-06 | 4.7 | 13 | 34 | -119.5 |
| 42.4 | 1940-10-11 | 4.7 | N/A | 33.78 | -118.42 |
| 15.1 | 1976-04-08 | 4.6 | 15 | 34.35 | -118.67 |
| 16.4 | 1984-10-26 | 4.6 | 13 | 34.02 | -118.99 |
| 22.0 | 1971-03-31 | 4.6 | 2 | 34.29 | -118.52 |
| 28.8 | 1956-02-07 | 4.6 | N/A | 34.58 | -118.6 |
| 42.8 | 1981-10-23 | 4.6 | 6 | 33.64 | -119.06 |
| 43.0 | 1981-10-23 | 4.6 | 12 | 33.63 | -119.02 |
| 20.3 | 1965-07-16 | 4.5 | N/A | 34.4 | -118.6 |
| 26.2 | 1971-03-07 | 4.5 | 3 | 34.35 | -118.46 |
| 28.5 | 1979-10-17 | 4.5 | 6 | 33.9 | -118.63 |
| 28.7 | 1971-02-21 | 4.5 | 7 | 34.39 | -118.43 |
| 30.8 | 1971-02-10 | 4.5 | 6 | 34.43 | -118.41 |
| 39.1 | 1941-07-01 | 4.5 | 16 | 34.33 | -119.58 |
| 39.1 | 1941-09-08 | 4.5 | 16 | 34.33 | -119.58 |
| 39.1 | 1941-07-12 | 4.5 | 16 | 34.33 | -119.58 |
| 45.5 | 1968-06-29 | 4.5 | N/A | 34.25 | -119.7 |
| 46.9 | 1944-06-19 | 4.5 | N/A | 33.87 | -118.22 |
| 48.2 | 1954-02-10 | 4.5 | N/A | 34.93 | -119.07 |
| 48.7 | 1968-07-07 | 4.5 | N/A | 34.17 | -119.75 |
| 21.8 | 1954-11-17 | 4.4 | N/A | 34.5 | -119.13 |
| 36.9 | 1972-07-27 | 4.4 | 8 | 34.78 | -118.9 |
| 37.5 | 1968-06-29 | 4.4 | N/A | 34.26 | -119.56 |
| 29.5 | 1971-02-10 | 4.3 | 10 | 34.4 | -118.42 |
| 34.6 | 1971-02-10 | 4.3 | 5 | 34.41 | -118.33 |
| 46.7 | 1965-08-13 | 4.3 | N/A | 34.4 | -119.7 |
| 48.6 | 1933-10-25 | 4.3 | N/A | 33.95 | -118.13 |
| 49.9 | 1969-02-28 | 4.3 | N/A | 34.57 | -118.12 |
| 13.9 | 1982-04-13 | 4.2 | 17 | 34.05 | -118.96 |
| 18.5 | 1971-04-15 | 4.2 | 4 | 34.27 | -118.58 |
| 20.9 | 1984-06-12 | 4.2 | 12 | 34.54 | -118.99 |
| 25.4 | 1971-03-25 | 4.2 | 5 | 34.36 | -118.48 |
| 26.4 | 1950-08-22 | 4.2 | 16 | 34.15 | -119.35 |
| 29.8 | 1971-04-01 | 4.2 | 7 | 34.41 | -118.42 |
| 30.7 | 1971-02-09 | 4.2 | 1 | 34.46 | -118.43 |
| 31.6 | 1977-09-24 | 4.2 | 5 | 34.47 | -118.42 |
| 33.4 | 1965-12-11 | 4.2 | N/A | 34.7 | -118.7 |
| 24.3 | 1979-01-01 | 4.1 | 2 | 33.95 | -118.67 |
| 25.5 | 1971-03-30 | 4.1 | 3 | 34.3 | -118.46 |
| 33.3 | 1971-02-09 | 4.1 | 11 | 34.34 | -118.33 |
| 42.7 | 1968-06-29 | 4.1 | N/A | 34.25 | -119.65 |
| 45.0 | 1950-01-11 | 4.1 | 1 | 33.95 | -118.2 |
| 12.2 | 1985-04-03 | 4 | 28 | 34.38 | -119.04 |
| 17.8 | 1973-02-22 | 4 | 17 | 34 | -119 |
| 20.3 | 1982-12-30 | 4 | N/A | 33.96 | -118.82 |
| 21.3 | 1971-06-21 | 4 | 4 | 34.27 | -118.53 |
| 21.4 | 1971-04-02 | 4 | 3 | 34.28 | -118.53 |
| 24.7 | 1964-08-30 | 4 | N/A | 34.25 | -118.47 |
| 28.3 | 1978-05-23 | 4 | 5 | 33.9 | -119.17 |
| 29.6 | 1950-01-24 | 4 | 16 | 34.67 | -118.83 |
| 29.7 | 1971-02-09 | 4 | 12 | 34.36 | -118.4 |
| 34.3 | 1971-04-25 | 4 | 2 | 34.37 | -118.32 |
| 35.4 | 1971-02-10 | 4 | 1 | 34.37 | -118.3 |
| 38.7 | 1968-06-29 | 4 | N/A | 34.24 | -119.58 |
| 39.1 | 1941-09-25 | 4 | 16 | 34.33 | -119.58 |
| 40.4 | 1968-07-31 | 4 | N/A | 34.25 | -119.61 |
| 41.5 | 1968-07-08 | 4 | N/A | 34.25 | -119.63 |
| 45.0 | 1968-06-26 | 4 | N/A | 34.21 | -119.69 |
| 45.2 | 1968-06-29 | 4 | N/A | 34.18 | -119.69 |
| 47.2 | 1962-09-16 | 4 | N/A | 34.48 | -119.68 |
| 47.4 | 1968-07-05 | 4 | N/A | 34.19 | -119.73 |
| 47.7 | 1968-07-05 | 4 | N/A | 34.07 | -119.71 |
| 47.8 | 1933-11-13 | 4 | N/A | 33.87 | -118.2 |
| 47.9 | 1963-01-09 | 4 | N/A | 34.92 | -119.1 |
| 15.9 | 1981-06-12 | 3.9 | 15 | 34.36 | -118.66 |
| 19.8 | 1950-06-08 | 3.9 | 16 | 34.25 | -119.25 |
| 23.8 | 1971-02-09 | 3.9 | 7 | 34.3 | -118.49 |
| 25.7 | 1971-02-09 | 3.9 | 7 | 34.35 | -118.47 |
| 28.5 | 1971-03-07 | 3.9 | 5 | 34.38 | -118.43 |
| 32.1 | 1971-02-15 | 3.9 | 13 | 34.47 | -118.41 |
| 32.5 | 1981-07-29 | 3.9 | 1 | 33.8 | -118.72 |
| 33.5 | 1976-10-17 | 3.9 | 15 | 34.45 | -118.37 |
| 36.3 | 1948-09-03 | 3.9 | 16 | 34.33 | -119.53 |
| 39.2 | 1981-09-11 | 3.9 | 6 | 33.73 | -119.19 |
| 40.2 | 1981-12-14 | 3.9 | 5 | 33.7 | -119.15 |
| 46.7 | 1963-04-12 | 3.9 | N/A | 34.92 | -118.95 |
| 48.3 | 1964-05-24 | 3.9 | N/A | 34.9 | -119.2 |
| 49.4 | 1958-01-13 | 3.9 | 14 | 34.95 | -119.05 |
| 15.9 | 1961-11-13 | 3.8 | N/A | 34.02 | -118.85 |
| 19.1 | 1962-04-19 | 3.8 | N/A | 34.3 | -119.23 |
| 21.4 | 1982-10-24 | 3.8 | 14 | 34.08 | -119.22 |
| 22.7 | 1971-02-14 | 3.8 | 1 | 34.3 | -118.51 |
| 26.0 | 1976-11-22 | 3.8 | 2 | 33.95 | -118.62 |
| 29.8 | 1972-02-25 | 3.8 | 13 | 34.43 | -118.43 |
| 30.8 | 1971-02-09 | 3.8 | 8 | 34.41 | -118.4 |
| 39.4 | 1983-03-01 | 3.8 | 6 | 33.94 | -118.32 |
| 39.8 | 1984-04-22 | 3.8 | 14 | 34.24 | -119.6 |
| 44.1 | 1981-09-05 | 3.8 | 8 | 33.63 | -119.11 |
| 44.5 | 1968-06-26 | 3.8 | N/A | 34.21 | -119.68 |
| 49.5 | 1960-08-20 | 3.8 | N/A | 33.68 | -118.37 |
| 16.4 | 1964-02-08 | 3.7 | N/A | 34.2 | -118.62 |
| 17.8 | 1973-03-17 | 3.7 | 8 | 34 | -119 |
| 20.7 | 1971-02-20 | 3.7 | 6 | 34.26 | -118.54 |
| 21.7 | 1979-01-15 | 3.7 | 10 | 33.97 | -118.72 |
| 23.5 | 1979-01-02 | 3.7 | 6 | 33.95 | -118.7 |
| 23.5 | 1979-03-05 | 3.7 | 13 | 33.95 | -118.7 |
| 25.3 | 1973-01-27 | 3.7 | 8 | 34.4 | -118.5 |
| 25.5 | 1979-01-01 | 3.7 | 6 | 33.93 | -118.67 |
| 25.9 | 1971-03-28 | 3.7 | 6 | 34.36 | -118.47 |
| 29.2 | 1947-10-13 | 3.7 | N/A | 33.85 | -118.72 |
| 29.2 | 1972-02-02 | 3.7 | 12 | 34.41 | -118.43 |
| 32.8 | 1981-07-30 | 3.7 | 2 | 33.79 | -118.74 |
| 35.2 | 1958-10-03 | 3.7 | 16 | 34.37 | -119.5 |
| 36.0 | 1973-08-20 | 3.7 | 8 | 34.4 | -118.3 |
| 44.4 | 1968-07-05 | 3.7 | N/A | 34.26 | -119.68 |
| 16.4 | 1978-10-29 | 3.6 | 3 | 34.32 | -118.63 |
| 18.9 | 1970-08-26 | 3.6 | 8 | 34.21 | -119.23 |
| 23.3 | 1983-01-28 | 3.6 | 13 | 33.94 | -118.73 |
| 24.7 | 1966-12-26 | 3.6 | N/A | 33.99 | -118.6 |
| 24.8 | 1969-06-22 | 3.6 | N/A | 33.92 | -118.72 |
| 28.6 | 1973-09-04 | 3.6 | 8 | 34.3 | -119.4 |
| 29.8 | 1972-10-21 | 3.6 | 9 | 34.41 | -118.42 |
| 30.0 | 1972-02-08 | 3.6 | 9 | 34.4 | -118.41 |
| 30.6 | 1973-09-24 | 3.6 | 8 | 34.4 | -118.4 |
| 31.3 | 1971-05-01 | 3.6 | 5 | 34.43 | -118.4 |
| 32.3 | 1981-07-30 | 3.6 | 8 | 33.8 | -118.73 |
| 38.2 | 1968-07-31 | 3.6 | N/A | 34.22 | -119.57 |
| 39.0 | 1982-02-02 | 3.6 | 10 | 33.75 | -119.23 |
| 41.5 | 1968-07-30 | 3.6 | N/A | 34.26 | -119.63 |
| 41.6 | 1968-07-08 | 3.6 | N/A | 34.27 | -119.63 |
| 43.3 | 1968-07-08 | 3.6 | N/A | 34.07 | -119.63 |
| 43.6 | 1950-01-19 | 3.6 | 16 | 33.75 | -118.43 |
| 44.1 | 1968-07-10 | 3.6 | N/A | 34.18 | -119.67 |
| 45.0 | 1948-02-20 | 3.6 | 16 | 33.92 | -118.22 |
| 48.1 | 1978-09-24 | 3.6 | 4 | 34.38 | -119.73 |
| 16.0 | 1948-04-17 | 3.5 | 16 | 34.02 | -118.97 |
| 17.8 | 1973-03-16 | 3.5 | 8 | 34 | -119 |
| 17.8 | 1973-03-05 | 3.5 | 8 | 34 | -119 |
| 18.0 | 1981-02-27 | 3.5 | 16 | 34.17 | -118.6 |
| 20.9 | 1984-02-07 | 3.5 | N/A | 34.31 | -119.26 |
| 20.9 | 1971-02-16 | 3.5 | 13 | 34.29 | -118.54 |
| 22.4 | 1983-04-16 | 3.5 | 6 | 34.35 | -118.53 |
| 27.6 | 1941-02-20 | 3.5 | 16 | 34.52 | -118.55 |
| 27.9 | 1971-02-21 | 3.5 | 6 | 34.4 | -118.45 |
| 29.2 | 1971-12-24 | 3.5 | 8 | 34.41 | -118.43 |
| 30.5 | 1971-06-01 | 3.5 | 17 | 34.37 | -118.39 |
| 30.6 | 1973-02-05 | 3.5 | 8 | 34.4 | -118.4 |
| 30.8 | 1971-02-09 | 3.5 | 8 | 34.41 | -118.4 |
| 31.6 | 1971-02-25 | 3.5 | 2 | 34.34 | -118.36 |
| 33.1 | 1970-03-01 | 3.5 | 8 | 33.98 | -118.42 |
| 34.3 | 1971-02-24 | 3.5 | 3 | 34.4 | -118.33 |
| 34.7 | 1971-02-17 | 3.5 | 5 | 34.36 | -118.31 |
| 37.0 | 1971-12-13 | 3.5 | 8 | 34.78 | -118.87 |
| 37.6 | 1945-02-06 | 3.5 | 16 | 33.95 | -118.35 |
| 37.8 | 1966-10-02 | 3.5 | N/A | 33.97 | -118.33 |
| 38.1 | 1941-02-11 | 3.5 | 16 | 34.27 | -119.57 |
| 39.0 | 1936-03-01 | 3.5 | 16 | 33.98 | -118.3 |
| 39.1 | 1941-09-09 | 3.5 | 16 | 34.33 | -119.58 |
| 41.0 | 1984-04-21 | 3.5 | 12 | 34.25 | -119.62 |
| 41.0 | 1968-06-29 | 3.5 | N/A | 34.23 | -119.62 |
| 41.8 | 1932-01-31 | 3.5 | 16 | 33.88 | -118.32 |
| 42.1 | 1984-04-25 | 3.5 | 12 | 34.25 | -119.64 |
| 42.2 | 1950-05-13 | 3.5 | 16 | 33.88 | -118.31 |
| 42.7 | 1951-03-26 | 3.5 | 16 | 34.62 | -119.5 |
| 44.4 | 1968-07-05 | 3.5 | N/A | 34.23 | -119.68 |
| 44.4 | 1968-10-15 | 3.5 | N/A | 34.22 | -119.68 |
| 46.1 | 1968-07-05 | 3.5 | N/A | 34.26 | -119.71 |
| 46.2 | 1968-07-02 | 3.5 | N/A | 34.21 | -119.71 |
| 46.2 | 1973-03-21 | 3.5 | 9 | 33.8 | -118.3 |
| 46.7 | 1979-02-15 | 3.5 | 5 | 34.27 | -119.72 |
| 48.9 | 1933-10-05 | 3.5 | N/A | 33.77 | -118.27 |
| 49.0 | 1941-02-08 | 3.5 | 16 | 34.55 | -119.68 |
Historical Tornado Events
A total of 4 historical tornado events that had recorded magnitude of 2 or above found in or near Santa Rosa Valley, CA.
| Distance (miles) | Date | Magnitude | Start Lat/Log | End Lat/Log | Length | Width | Fatalities | Injuries | Property Damage | Crop Damage | Affected County |
| 26.2 | 1982-11-09 | 2 | 34°11'N / 118°27'W | 1.00 Mile | 150 Yards | 0 | 0 | 2.5M | 0 | Los Angeles | |
| 34.9 | 1983-03-01 | 2 | 33°59'N / 118°22'W | 34°03'N / 118°21'W | 3.50 Miles | 100 Yards | 0 | 30 | 25.0M | 0 | Los Angeles |
| 41.9 | 1966-11-07 | 2 | 33°54'N / 118°18'W | 0.10 Mile | 33 Yards | 0 | 0 | 3K | 0 | Los Angeles | |
| 45.2 | 1966-11-07 | 2 | 33°51'N / 118°20'W | 33°54'N / 118°10'W | 10.30 Miles | 50 Yards | 0 | 10 | 250K | 0 | Los Angeles |
* 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.