Visalia, Porterville Metro Area Natural Disasters and Weather Extremes
The chance of earthquake damage in Visalia, Porterville Area is much lower than California average and is much higher than the national average. The risk of tornado damage in Visalia, Porterville Area is about the same as California average and is much lower than the national average.
Earthquake Index, #45
| Visalia, Porterville Area | 3.43 |
| 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, #51
| Visalia, Porterville Area | 0.0090 |
| 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, #821
| Visalia, Porterville Area | 11.28 |
| 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 998 other weather extremes events within 50 miles of Visalia, Porterville Area 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: | 4 |
| Dust Storm: | 0 | Flood: | 151 | Hail: | 167 | Heat: | 0 | Heavy Snow: | 1 |
| High Surf: | 0 | Hurricane: | 0 | Ice Storm: | 0 | Landslide: | 0 | Strong Wind: | 12 |
| Thunderstorm Winds: | 98 | Tropical Storm: | 0 | Wildfire: | 75 | Winter Storm: | 1 | Winter Weather: | 0 |
| Other: | 487 | ||||||||
Volcanos Nearby
A total of 8 volcanoes are found in or near Visalia, Porterville Area.
| Distance (miles) | Name | Region | Latitude | Longitude | Elevation (foot) | Type | Status | Last Eruption |
| 27.1 | Golden Trout Creek | US-California, United States | 36.358 | -118.32 | 2886 | Volcanic field | Tephrochronology | Last known eruption B.C. (Holocene) |
| 55.3 | Coso Volc Field | US-California, United States | 36.03 | -117.82 | 2400 | Lava dome | Holocene | Unknown |
| 91.7 | Ubehebe Craters | US-California, United States | 37.02 | -117.45 | 752 | Maar | Holocene | Undated, but probable Holocene eruption |
| 94.4 | Red Cones | US-California, United States | 37.58 | -119.05 | 2748 | Cinder cone | Holocene | Undated, but probable Holocene eruption |
| 101.6 | Long Valley | US-California, United States | 37.7 | -118.87 | 3390 | Caldera | Pleistocene-Fumarol | Quaternary eruption(s) with the only known Holocene activity being hydrothermal |
| 101.8 | Inyo Craters | US-California, United States | 37.692 | -119.02 | 2629 | Lava dome | Radiocarbon | Last known eruption A.D. 1-1499 |
| 114.5 | Mono Craters | US-California, United States | 37.88 | -119 | 2796 | Lava dome | Radiocarbon | Last known eruption A.D. 1-1499 |
| 122.9 | Mono Lake Volc Field | US-California, United States | 38 | -119.03 | 2121 | Cinder cone | Tephrochronology | Last known eruption 1700-1799 |
Historical Earthquake Events
A total of 40 historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Visalia, Porterville Area.
| Distance (miles) | Date | Magnitude | Depth (km) | Latitude | Longitude |
| 32.6 | 1983-10-21 | 4.9 | N/A | 35.93 | -118.33 |
| 46.3 | 1959-01-05 | 4.7 | N/A | 36.13 | -117.96 |
| 9.1 | 1948-02-11 | 4.6 | 12 | 36.1 | -118.8 |
| 32.8 | 1932-07-26 | 4.5 | 16 | 35.8 | -118.53 |
| 49.6 | 1943-09-16 | 4.5 | 16 | 36.02 | -117.93 |
| 45.2 | 1959-01-16 | 4.3 | N/A | 36.13 | -117.98 |
| 32.2 | 1983-10-19 | 4.2 | 1 | 35.93 | -118.34 |
| 42.8 | 1973-09-15 | 4.2 | 18 | 36.6 | -119.4 |
| 2.4 | 1967-04-06 | 4.1 | N/A | 36.2 | -118.8 |
| 33.0 | 1983-11-07 | 4.1 | N/A | 35.93 | -118.32 |
| 34.4 | 1963-12-06 | 4.1 | N/A | 36.4 | -118.2 |
| 34.6 | 1983-10-25 | 4.1 | 1 | 35.87 | -118.35 |
| 44.2 | 1971-03-08 | 4.1 | 6 | 35.67 | -118.4 |
| 46.3 | 1959-01-19 | 4.1 | N/A | 36.13 | -117.96 |
| 46.4 | 1954-11-17 | 4.1 | N/A | 36.47 | -118 |
| 45.0 | 1971-11-24 | 4 | 8 | 35.68 | -118.35 |
| 45.3 | 1971-03-03 | 4 | 4 | 35.66 | -118.38 |
| 46.3 | 1943-05-30 | 4 | 16 | 36.13 | -117.96 |
| 46.3 | 1943-07-10 | 4 | 16 | 35.73 | -118.23 |
| 45.0 | 1959-01-12 | 3.9 | N/A | 36.15 | -117.98 |
| 32.6 | 1983-10-19 | 3.8 | N/A | 35.92 | -118.34 |
| 42.6 | 1954-05-25 | 3.8 | N/A | 35.65 | -118.52 |
| 30.9 | 1970-03-24 | 3.7 | 10 | 36.29 | -118.23 |
| 33.0 | 1983-10-25 | 3.7 | 1 | 35.92 | -118.33 |
| 37.8 | 1983-01-17 | 3.7 | 7 | 35.7 | -118.61 |
| 41.2 | 1982-05-31 | 3.7 | 9 | 35.72 | -118.4 |
| 46.3 | 1959-01-06 | 3.7 | N/A | 36.13 | -117.96 |
| 44.8 | 1972-01-06 | 3.6 | 8 | 35.7 | -118.32 |
| 14.7 | 1957-06-05 | 3.5 | N/A | 36.3 | -119.03 |
| 17.9 | 1941-11-12 | 3.5 | 16 | 36.42 | -119 |
| 24.9 | 1985-11-05 | 3.5 | 7 | 35.95 | -118.5 |
| 36.0 | 1951-07-27 | 3.5 | 16 | 35.75 | -118.53 |
| 43.2 | 1941-02-21 | 3.5 | 16 | 35.7 | -118.37 |
| 45.0 | 1932-04-19 | 3.5 | 16 | 35.68 | -118.35 |
| 45.2 | 1969-06-19 | 3.5 | N/A | 36.12 | -119.58 |
| 46.6 | 1943-03-26 | 3.5 | N/A | 36.15 | -117.95 |
| 46.6 | 1936-04-26 | 3.5 | 10 | 36.15 | -117.95 |
| 47.2 | 1941-08-17 | 3.5 | 16 | 36.5 | -118 |
| 47.9 | 1941-06-08 | 3.5 | 16 | 36.72 | -118.17 |
| 48.2 | 1961-10-31 | 3.5 | N/A | 35.55 | -118.97 |
Historical Tornado Events
A total of 2 historical tornado events that had recorded magnitude of 2 or above found in or near Visalia, Porterville Area.
| Distance (miles) | Date | Magnitude | Start Lat/Log | End Lat/Log | Length | Width | Fatalities | Injuries | Property Damage | Crop Damage | Affected County |
| 40.3 | 1980-04-05 | 2 | 36°19'N / 119°33'W | 36°17'N / 119°27'W | 6.10 Miles | 33 Yards | 0 | 0 | 3K | 0 | Tulare |
| 47.6 | 1980-04-05 | 2 | 36°22'N / 119°42'W | 36°19'N / 119°33'W | 8.90 Miles | 10 Yards | 0 | 1 | 250K | 0 | Kings |
* 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.