Gervais School District 1 Natural Disasters and Weather Extremes
The chance of earthquake damage in Gervais School District 1 is much higher than Oregon average and is higher than the national average. The risk of tornado damage in Gervais School District 1 is about the same as Oregon average and is much lower than the national average.
Earthquake Index, #4
| Gervais School District 1 | 2.20 |
| Oregon | 0.62 |
| 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, #71
| Gervais School District 1 | 0.0198 |
| Oregon | 0.0291 |
| 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, #31
| Gervais School District 1 | 16.35 |
| Oregon | 8.38 |
| 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 336 other weather extremes events within 50 miles of Gervais School District 1 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: | 0 | Drought: | 0 |
| Dust Storm: | 0 | Flood: | 74 | Hail: | 33 | Heat: | 0 | Heavy Snow: | 4 |
| High Surf: | 0 | Hurricane: | 0 | Ice Storm: | 0 | Landslide: | 0 | Strong Wind: | 17 |
| Thunderstorm Winds: | 33 | Tropical Storm: | 0 | Wildfire: | 1 | Winter Storm: | 0 | Winter Weather: | 0 |
| Other: | 174 | ||||||||
Volcanos Nearby
A total of 12 volcanoes are found in or near Gervais School District 1.
| Distance (miles) | Name | Region | Latitude | Longitude | Elevation (foot) | Type | Status | Last Eruption |
| 62.0 | Jefferson | US-Oregon, United States | 44.692 | -121.8 | 3199 | Stratovolcano | Varve Count | Last known eruption A.D. 1-1499 |
| 64.0 | Hood | US-Oregon, United States | 45.374 | -121.694 | 3426 | Stratovolcano | Historical | Last known eruption 1800-1899 |
| 69.2 | West Crater | US-Washington, United States | 45.88 | -122.08 | 1329 | Volcanic field | Radiocarbon | Last known eruption B.C. (Holocene) |
| 69.3 | Sand Mountain Field | US-Oregon, United States | 44.38 | -121.93 | 1664 | Cinder cone | Radiocarbon | Last known eruption B.C. (Holocene) |
| 73.4 | Blue Lake Crater | US-Oregon, United States | 44.42 | -121.77 | 1230 | Maar | Radiocarbon | Last known eruption B.C. (Holocene) |
| 74.9 | Washington | US-Oregon, United States | 44.332 | -121.837 | 2376 | Shield volcano | Radiocarbon | Last known eruption A.D. 1-1499 |
| 77.1 | Belknap | US-Oregon, United States | 44.285 | -121.841 | 2095 | Shield volcano | Radiocarbon | Last known eruption A.D. 1-1499 |
| 79.9 | Indian Heaven | US-Washington, United States | 45.93 | -121.82 | 1513 | Shield volcano | Radiocarbon | Last known eruption B.C. (Holocene) |
| 85.3 | North Sister Field | US-Oregon, United States | 44.17 | -121.77 | 3074 | Complex volcano | Radiocarbon | Last known eruption A.D. 1-1499 |
| 85.6 | St. Helens | US-Washington, United States | 46.2 | -122.18 | 2549 | Stratovolcano | Historical | Last known eruption 1964 or later |
| 88.9 | South Sister | US-Oregon, United States | 44.1 | -121.77 | 3157 | Complex volcano | Radiocarbon | Last known eruption B.C. (Holocene) |
| 98.0 | Bachelor | US-Oregon, United States | 43.979 | -121.688 | 2763 | Stratovolcano | Tephrochronology | Last known eruption B.C. (Holocene) |
Historical Earthquake Events
A total of 5 historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Gervais School District 1.
| Distance (miles) | Date | Magnitude | Depth (km) | Latitude | Longitude |
| 43.3 | 1964-10-01 | 5.3 | N/A | 45.7 | -122.8 |
| 40.2 | 1962-11-06 | 4.8 | N/A | 45.63 | -122.67 |
| 29.9 | 1963-03-07 | 4.6 | N/A | 44.9 | -123.5 |
| 34.0 | 1961-08-19 | 4.5 | N/A | 44.7 | -122.5 |
| 48.2 | 1963-12-27 | 4.5 | N/A | 45.7 | -123.4 |
Historical Tornado Events
A total of 3 historical tornado events that had recorded magnitude of 2 or above found in or near Gervais School District 1.
| Distance (miles) | Date | Magnitude | Start Lat/Log | End Lat/Log | Length | Width | Fatalities | Injuries | Property Damage | Crop Damage | Affected County |
| 17.2 | 2010-12-14 | 2 | 44°50'N / 122°52'W | 44°51'N / 122°49'W | 5.00 Miles | 150 Yards | 0 | 2 | 1.2M | 0K | Marion |
| Brief Description: EVENT NARRATIVE: On December 14th at 11:40 AM PST, a tornado with an Enhanced Fujita Scale rating of EF2 moved northeast across the community of Aumsville, Oregon. The estimated length of the tornado path was 5 miles with a width of 150 yards. There were two minor injuries, fifty structures damaged, more than thirty large trees blown down or snapped off, five sheds damaged and two semi-trailers tipped over. The estimated value of the damage was $1.2 million. EPISODE NARRATIVE: A strong cold pool of air aloft produced a very unstable airmass over western Oregon. A vigorous low pressure center was just off the Washington Coast with a surface trough moving through western Oregon. This trough served as a focus for thunderstorms during the day. One of these thunderstorms produced a tornado that wreaked havoc on the community of Aumsville. | |||||||||||
| 38.9 | 1972-04-05 | 3 | 45°36'N / 122°38'W | 45°36'N / 122°38'W | 0 | 0 | 250K | 0 | Multnomah | ||
| 41.8 | 1972-04-05 | 3 | 45°36'N / 122°38'W | 45°38'N / 122°27'W | 8.70 Miles | 440 Yards | 6 | 300 | 25.0M | 0 | Clark |
* 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.