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Harrisburg, OR Natural Disasters and Weather Extremes

 
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The chance of earthquake damage in Harrisburg is lower than Oregon average and is much lower than the national average. The risk of tornado damage in Harrisburg is about the same as Oregon average and is much lower than the national average.

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

Earthquake Index, #335

Harrisburg, OR
0.05
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, #197

Harrisburg, OR
0.0182
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, #150

Harrisburg, OR
7.58
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 180 other weather extremes events within 50 miles of Harrisburg, OR were recorded from 1950 to 2010. The following is a break down of these events:

TypeCountTypeCountTypeCountTypeCountTypeCount
Avalanche:0Blizzard:0Cold:0Dense Fog:0Drought:1
Dust Storm:0Flood:41Hail:19Heat:0Heavy Snow:0
High Surf:0Hurricane:0Ice Storm:0Landslide:0Strong Wind:2
Thunderstorm Winds:20Tropical Storm:0Wildfire:7Winter Storm:0Winter Weather:0
Other:90 

Volcanos Nearby

A total of 10 volcanoes are found in or near Harrisburg, OR.

Distance (miles)NameRegionLatitudeLongitudeElevation (foot)TypeStatusLast Eruption
61.4Sand Mountain FieldUS-Oregon, United States44.38-121.931664Cinder coneRadiocarbonLast known eruption B.C. (Holocene)
65.3BelknapUS-Oregon, United States44.285-121.8412095Shield volcanoRadiocarbonLast known eruption A.D. 1-1499
65.6WashingtonUS-Oregon, United States44.332-121.8372376Shield volcanoRadiocarbonLast known eruption A.D. 1-1499
69.3North Sister FieldUS-Oregon, United States44.17-121.773074Complex volcanoRadiocarbonLast known eruption A.D. 1-1499
69.5Blue Lake CraterUS-Oregon, United States44.42-121.771230MaarRadiocarbonLast known eruption B.C. (Holocene)
69.9South SisterUS-Oregon, United States44.1-121.773157Complex volcanoRadiocarbonLast known eruption B.C. (Holocene)
73.2JeffersonUS-Oregon, United States44.692-121.83199StratovolcanoVarve CountLast known eruption A.D. 1-1499
75.8BachelorUS-Oregon, United States43.979-121.6882763StratovolcanoTephrochronologyLast known eruption B.C. (Holocene)
82.4Davis LakeUS-Oregon, United States43.57-121.822163Volcanic fieldRadiocarbonLast known eruption B.C. (Holocene)
88.4Cinnamon ButteUS-Oregon, United States43.241-122.1081956Cinder coneHoloceneUnknown

Historical Earthquake Events

A total of 2 historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Harrisburg, OR.

Distance (miles)DateMagnitudeDepth (km)LatitudeLongitude
46.51963-03-074.6N/A44.9-123.5
44.11961-08-194.5N/A44.7-122.5

Historical Tornado Events

A total of 1 historical tornado event that had recorded magnitude of 2 or above found in or near Harrisburg, OR.

Distance (miles)DateMagnitudeStart Lat/LogEnd Lat/LogLengthWidthFatalitiesInjuriesProperty DamageCrop DamageAffected County
42.52010-12-14244°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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