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Oregon Natural Disasters and Weather Extremes

 
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The chance of earthquake damage in Oregon is lower than the national average. The risk of tornado damage in Oregon is much lower than the national average.

Topics:Earthquake IndexVolcano IndexTornado IndexOther Weather Extremes EventsVolcanos NearbyHistorical Earthquake EventsHistorical Tornado Events

Earthquake Index, #17

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, #2

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, #47

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 4,446 other weather extremes events from 1950 to 2010 were recorded in Oregon. The following is a break down of these events:

TypeCountTypeCountTypeCountTypeCountTypeCount
Avalanche:10Blizzard:20Cold:203Dense Fog:18Drought:7
Dust Storm:13Flood:369Hail:563Heat:11Heavy Snow:755
High Surf:25Hurricane:0Ice Storm:24Landslide:19Strong Wind:1,151
Thunderstorm Winds:341Tropical Storm:0Wildfire:321Winter Storm:77Winter Weather:22
Other:497 

Volcanos Nearby

A total of 34 volcanoes are found in or near Oregon.

NameRegionLatitudeLongitudeElevation (foot)TypeStatusLast Eruption
Devils GardenUS-Oregon, United States43.512-120.8611698Volcanic fieldHoloceneUnknown
Newberry VolcanoUS-Oregon, United States43.722-121.2292434Shield volcanoRadiocarbonLast known eruption A.D. 1-1499
Squaw Ridge FieldUS-Oregon, United States43.472-120.7541711Volcanic fieldHoloceneUnknown
Four Craters Lava FieldUS-Oregon, United States43.361-120.6691501Volcanic fieldHoloceneUnknown
BachelorUS-Oregon, United States43.979-121.6882763StratovolcanoTephrochronologyLast known eruption B.C. (Holocene)
South SisterUS-Oregon, United States44.1-121.773157Complex volcanoRadiocarbonLast known eruption B.C. (Holocene)
North Sister FieldUS-Oregon, United States44.17-121.773074Complex volcanoRadiocarbonLast known eruption A.D. 1-1499
BelknapUS-Oregon, United States44.285-121.8412095Shield volcanoRadiocarbonLast known eruption A.D. 1-1499
Blue Lake CraterUS-Oregon, United States44.42-121.771230MaarRadiocarbonLast known eruption B.C. (Holocene)
WashingtonUS-Oregon, United States44.332-121.8372376Shield volcanoRadiocarbonLast known eruption A.D. 1-1499
Davis LakeUS-Oregon, United States43.57-121.822163Volcanic fieldRadiocarbonLast known eruption B.C. (Holocene)
Sand Mountain FieldUS-Oregon, United States44.38-121.931664Cinder coneRadiocarbonLast known eruption B.C. (Holocene)
JeffersonUS-Oregon, United States44.692-121.83199StratovolcanoVarve CountLast known eruption A.D. 1-1499
Cinnamon ButteUS-Oregon, United States43.241-122.1081956Cinder coneHoloceneUnknown
Crater LakeUS-Oregon, United States42.93-122.122487CalderaRadiocarbonLast known eruption B.C. (Holocene)
HoodUS-Oregon, United States45.374-121.6943426StratovolcanoHistoricalLast known eruption 1800-1899
Diamond CratersUS-Oregon, United States43.1-118.751435Volcanic fieldHoloceneUnknown
Imagination PeakUS-Oregon, United States42.552-122.2011986Pyroclastic coneHoloceneUnknown
Indian HeavenUS-Washington, United States45.93-121.821513Shield volcanoRadiocarbonLast known eruption B.C. (Holocene)
West CraterUS-Washington, United States45.88-122.081329Volcanic fieldRadiocarbonLast known eruption B.C. (Holocene)
Saddle ButteUS-Oregon, United States43-117.81700Volcanic fieldHoloceneUnknown
AdamsUS-Washington, United States46.206-121.493742StratovolcanoTephrochronologyLast known eruption A.D. 1-1499
St. HelensUS-Washington, United States46.2-122.182549StratovolcanoHistoricalLast known eruption 1964 or later
Medicine LakeUS-California, United States41.58-121.572412Shield volcanoRadiocarbonLast known eruption A.D. 1-1499
Jordan CratersUS-Oregon, United States43.03-117.421473Volcanic fieldHoloceneUndated, but probable Holocene eruption
Jackies ButteUS-Oregon, United States42.606-117.5891420Volcanic fieldHoloceneUnknown
ShastaUS-California, United States41.42-122.24317StratovolcanoHistoricalLast known eruption 1700-1799
Brushy ButteUS-California, United States41.178-121.4431174Shield volcanoHoloceneUnknown
RainierUS-Washington, United States46.87-121.7584392StratovolcanoDendrochronologyLast known eruption 1800-1899
Big CaveUS-California, United States40.955-121.3651259Shield volcanoHoloceneUnknown
Twin ButtesUS-California, United States40.78-121.61631Cinder coneHoloceneUnknown
Eagle Lake FieldUS-California, United States40.63-120.831652Fissure ventHoloceneUnknown
Tumble ButtesUS-California, United States40.68-121.552191Cinder coneHoloceneUnknown
Potato ButteUS-California, United States40.63-121.431532Shield volcanoHoloceneUnknown

Historical Earthquake Events

A total of 21 historical earthquake events that had recorded magnitudes of 3.5 or above found in Oregon.

DateMagnitudeDepth (km)LatitudeLongitude
1964-10-015.3N/A45.7-122.8
1968-05-305.1N/A42.3-119.8
1968-06-035N/A42.2-119.8
1968-06-054.7N/A42.3-119.9
1968-06-044.7N/A42.3-119.9
1963-03-074.6N/A44.9-123.5
1976-04-134.61545.22-120.77
1980-05-034.5541.94-118.84
1961-08-194.5N/A44.7-122.5
1963-12-274.5N/A45.7-123.4
1968-06-044.3N/A42.2-119.8
1968-06-124.3N/A42.1-119.9
1968-06-044.2N/A42.3-119.9
1976-04-174.2245.08-120.8
1984-01-314.1545.58-116.57
1968-06-044N/A42.3-119.8
1984-08-104544.99-116.95
1971-07-133.93344.8-117.9
1985-02-103.91845.7-119.63
1971-06-173.51543.28-124.38
1984-07-303.5842.15-121.88

Historical Tornado Events

A total of 3 historical tornado events that had recorded magnitude of 2 or above found in Oregon.

DateMagnitudeStart Lat/LogEnd Lat/LogLengthWidthFatalitiesInjuriesProperty DamageCrop DamageAffected County
1972-04-05345°36'N / 122°38'W45°36'N / 122°38'W00250K0Multnomah
1968-06-11245°50'N / 117°20'W45°54'N / 117°09'W9.60 Miles880 Yards0025.0M0Wallowa
2010-12-14244°50'N / 122°52'W44°51'N / 122°49'W5.00 Miles150 Yards021.2M0KMarion
 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.


* 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.


 
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