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Johnson County Natural Disasters and Weather Extremes

 
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The chance of earthquake damage in Johnson County is lower than Arkansas average and is much lower than the national average. The risk of tornado damage in Johnson County is lower than Arkansas average and is much higher than the national average.

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

Earthquake Index, #47

Johnson County
0.11
Arkansas
0.57
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, #1

Johnson County
0.0000
Arkansas
0.0000
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, #49

Johnson County
210.86
Arkansas
272.21
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 16,470 other weather extremes events within 50 miles of Johnson County were recorded from 1950 to 2010. The following is a break down of these events:

TypeCountTypeCountTypeCountTypeCountTypeCount
Avalanche:0Blizzard:0Cold:17Dense Fog:0Drought:14
Dust Storm:0Flood:1,668Hail:7,053Heat:21Heavy Snow:25
High Surf:0Hurricane:0Ice Storm:24Landslide:1Strong Wind:23
Thunderstorm Winds:7,169Tropical Storm:2Wildfire:5Winter Storm:33Winter Weather:46
Other:369 

Volcanos Nearby

No volcano is found in or near Johnson County.

Historical Earthquake Events

A total of 1 historical earthquake event that had a recorded magnitude of 3.5 or above found in or near Johnson County.

Distance (miles)DateMagnitudeDepth (km)LatitudeLongitude
25.41985-09-063.81035.81-93.12

Historical Tornado Events

A total of 83 historical tornado events that had recorded magnitude of 2 or above found in or near Johnson County.

Distance (miles)DateMagnitudeStart Lat/LogEnd Lat/LogLengthWidthFatalitiesInjuriesProperty DamageCrop DamageAffected County
4.61983-05-14235°38'N / 93°30'W0.50 Mile100 Yards00250K0Johnson
6.31954-02-15335°29'N / 93°29'W1.00 Mile100 Yards024250K0Johnson
6.81961-03-12235°28'N / 93°48'W35°38'N / 93°22'W26.90 Miles17 Yards114250K0Johnson
7.41980-04-07335°27'N / 93°30'W35°29'N / 93°27'W3.60 Miles1707 Yards0762.5M0Johnson
7.51985-11-18235°28'N / 93°28'W35°41'N / 93°12'W18.00 Miles30 Yards002.5M0Johnson
7.61957-01-22235°33'N / 93°40'W35°34'N / 93°32'W7.40 Miles33 Yards000K0Johnson
7.82001-11-23235°31'N / 93°43'W35°45'N / 93°27'W22.70 Miles500 Yards1400Johnson
 Brief Description: An F2 tornado that developed over Franklin County, moved into Johnson County about 3 miles west-southwest of Hunt, on Highway 352. The tornado moved northeastward, passing just northwest of Hunt. The tornado continued on across a portion of Horsehead Lake, tracked several miles east of Catalpa and then crossed into Newton County about one mile west of Salus. The tornado killed a woman in a mobile home on County Road 272, about 1.5 miles northwest of Hunt. Two other people inside the mobile home sustained minor injuries. Two additional injuries occurred on County Road 29, about 1.5 miles north of Hunt, when two people were inside a chicken house when it was destroyed. Six chicken houses were destroyed at this location. Three of the chicken houses contained about 120 thousand chickens, many of which were killed. Other damage in Johnson County included more than a dozen barns destroyed, several mobile homes destroyed, several homes with major damage and a number of homes with lesser damage. A number of vehicles were destroyed and many others were damaged. Many outbuildings were destroyed and thousands of trees were blown down.
8.31960-04-14335°28'N / 93°24'W2.00 Miles100 Yards0025K0Johnson
8.41974-06-06335°40'N / 93°32'W35°43'N / 93°20'W11.70 Miles300 Yards0025K0Johnson
9.51999-03-05235°27'N / 93°36'W35°27'N / 93°29'W7.00 Miles200 Yards0000Johnson
 Brief Description: A strong tornado was spawned in southern Johnson County. Toward the town of Hartman, the tornado heavily damaged or destroyed a couple of barns. Farther northeast toward Clarksville, every piece of tin was removed from a chicken house. Chickens were thrown from the house and from nearby houses. Up to 10,000 chickens were lost in the storm. Numerous trees were also downed. The tornado tracked about 7 miles before dissipating just southwest of Clarksville
9.61960-05-18235°32'N / 93°20'W35°33'N / 93°16'W3.80 Miles1760 Yards000K0Johnson
9.91971-05-23235°42'N / 93°41'W35°42'N / 93°25'W14.90 Miles200 Yards0025K0Johnson
9.91988-11-15235°26'N / 93°25'W35°40'N / 93°10'W16.00 Miles150 Yards092.5M0Johnson
10.81965-03-16235°27'N / 93°35'W0025K0Johnson
11.52001-11-23235°43'N / 93°25'W35°45'N / 93°24'W1.80 Miles200 Yards0000Newton
 Brief Description: The F2 tornado over Johnson County crossed into Newton County about 4.5 miles southeast of Fallsville. The tornado continued to track to the northeast for 1.8 miles, before lifting 4.5 miles east-southeast of Fallsville. Since the tornado tracked across a national forest, damage along the path of the tornado consisted of numerous downed trees.
13.31973-04-20235°23'N / 93°30'W1.50 Miles500 Yards0225K0Logan
17.01961-03-12235°27'N / 93°45'W35°28'N / 93°43'W1.90 Miles17 Yards04250K0Franklin
17.01953-03-14335°13'N / 93°57'W35°33'N / 93°22'W40.10 Miles880 Yards00250K0Logan
17.11960-05-05235°21'N / 93°20'W2.00 Miles100 Yards0225K0Johnson
17.91957-05-11235°19'N / 93°31'W000K0Logan
19.02001-11-23235°48'N / 93°21'W35°50'N / 93°16'W18.50 Miles200 Yards0000Newton
 Brief Description: A strong tornado touched down in Newton County, tracking from 3.2 miles south-southwest of Swain to 4.5 miles east-southeast of Jasper. The thunderstorm that produced this tornado was the same storm that dropped a tornado over Johnson and southern Newton Counties a little earlier that evening. Significant damage occurred to an Inn and restaurant on Highway 7 in the Gum Springs community, or about 5 miles south-southeast of Jasper. The restaurant on the upper floor of the structure was destroyed. The roof was blown to the northwest, ending up across the highway from the building. The rear wall of the building went in the opposite direction, landing on a slope below the building. The tornado also damaged several houses and destroyed a number of outbuildings. Hundreds of trees were also blown down the entire path of the tornado.
19.61955-03-20235°17'N / 93°44'W35°22'N / 93°32'W12.60 Miles60 Yards0025K0Logan
20.61961-05-05235°27'N / 93°08'W1.00 Mile50 Yards1425K0Pope
21.81953-03-14335°19'N / 93°15'W35°24'N / 93°07'W9.50 Miles880 Yards073K0Pope
22.01953-03-14335°17'N / 93°17'W35°19'N / 93°15'W2.70 Miles880 Yards003K0Yell
22.21996-04-21335°46'N / 93°46'W35°56'N / 93°34'W15.00 Miles1050 Yards261.0M0Madison
 Brief Description: M37MH, M10MH
22.61982-12-23235°19'N / 93°43'W0.50 Mile100 Yards00250K0Logan
23.01961-11-02235°18'N / 93°42'W1.50 Miles100 Yards003K0Logan
23.21982-12-23235°19'N / 93°44'W0.60 Mile80 Yards00250K0Logan
24.71959-03-31335°18'N / 93°45'W2.00 Miles300 Yards0025K0Logan
27.21953-05-10235°16'N / 93°10'W35°17'N / 93°08'W2.30 Miles200 Yards000K0Pope
27.61999-04-26235°17'N / 93°08'W35°20'N / 93°04'W6.50 Miles150 Yards0200Pope
 Brief Description: A strong tornado was spawned in southern Pope County. The tornado developed near Russellville and moved northeast. The tornado destroyed a concrete block building, and two people were injured inside. An apartment complex lost its roof, some storage buildings were heavily damaged, 15 homes suffered structural damage, and 50 homes had minor damage...mostly to roof shingles. A number of chicken houses sustained damage as well, and trees and power lines were blown down. The tornado dissipated about 5 miles northeast of Russellville.
30.41975-02-22235°13'N / 93°07'W35°23'N / 92°58'W14.30 Miles80 Yards04250K0Pope
31.21996-04-21235°37'N / 94°02'W35°39'N / 94°00'W3.00 Miles400 Yards02500K0Franklin
 Brief Description: The tornado touched down just to the southwest of Fern. It moved northeastward, through the town of Fern, where 7 homes were destroyed and a number of other buildings were damaged. The tornado continued moving northeastward and lifted 3 miles northeast of Fern. A number of trees were blown down along the tornado's path. 2 people sustained minor injuries from the storm. Initial estimates place the amount of damage at around $500,000.
31.31962-03-20236°01'N / 93°21'W0.50 Mile300 Yards0225K0Newton
31.51970-09-04235°19'N / 93°08'W35°15'N / 92°56'W12.30 Miles100 Yards05250K0Pope
31.92006-01-12235°07'N / 93°21'W35°11'N / 93°08'W13.00 Miles75 Yards0000Yell
 Brief Description: A strong tornado touched down in northern Yell County, about 5 miles southwest of Chickalah. Estimated winds with the tornado were around 140 mph. A house was severely damaged. An abandoned mobile home, used for storage, was badly damaged. A few chicken houses had major damage, and a number of others had parts of the roofs taken off. A travel trailer was overturned, with numerous sheds and outbuildings destroyed. A number of power lines and power poles were blown down. Hundreds of trees were either snapped off or uprooted. A mobile home was also destroyed by fire, apparently due to a fallen power line. The tornado tracked to the east-northeast for about 13 miles before moving into southern Pope County.
32.02006-01-12235°12'N / 93°08'W35°13'N / 93°06'W1.70 Miles75 Yards0000Pope
 Brief Description: A strong tornado moved out of Yell County and into Pope County about 5.3 miles south of Russellville. Winds were estimated around 140 mph. The tornado downed a number of trees and power lines. Several houses sustained roof damage. The tornado dissipated roughly 5.5 miles south-southeast of Russellville.
32.31978-05-07235°16'N / 93°09'W35°15'N / 92°56'W12.30 Miles50 Yards0025K0Pope
32.91980-04-07235°08'N / 93°42'W35°08'N / 93°41'W00250K0Yell
33.31975-02-22235°05'N / 93°15'W35°13'N / 93°07'W11.90 Miles80 Yards0025K0Yell
33.42008-01-08235°21'N / 93°00'W35°24'N / 92°51'W10.00 Miles440 Yards113.5M0KPope
 Brief Description: EVENT NARRATIVE: A tornado touched down in central Pope County and tracked to the northeast. The Pope County Office of Emergency Management reported that 42 residential structures were affected. Of these, seven were destroyed, six had minor damage, and the rest had moderate to heavy damage. In addition, six chicken houses, two barns, and a number of outbuildings were destroyed, a travel trailer and motor home were overturned, and hundreds of trees were blown down. A 61 year-old man was killed and his wife was injured when their double-wide mobile home was destroyed on Simba Road, about 1.4 miles south-southeast of Appleton. Arkansas Governor Mike Beebe declared Pope County a state disaster area. The tornado continued into Conway County. EPISODE NARRATIVE: Severe thunderstorms affected a large part of Arkansas on the 8th. There were a number of reports of wind damage and an isolated tornado.
34.11999-02-06235°14'N / 93°04'W35°18'N / 92°55'W8.00 Miles250 Yards0000Pope
 Brief Description: A strong tornado was spawned in southern Pope County about 1 mile southwest of Pottsville. As the tornado moved northeast, it damaged or destroyed several mobile homes and caused roof damage to houses. Several campers, boat sheds and storage buildings also sustained some damage. Most of the damage was along or near Highway 247 just south of Pottsville. Farther northeast, not as much damage was noted. Some trees were downed and the roof of a barn was damaged north of Atkins on Highway 105. A tree fell on a mobile home as well in the same area.
34.81976-03-26335°03'N / 93°25'W35°08'N / 93°09'W16.10 Miles100 Yards042.5M0Yell
38.01982-12-02235°50'N / 93°06'W36°06'N / 92°53'W19.00 Miles220 Yards00250K0Clark
39.31997-03-01235°23'N / 92°51'W35°28'N / 92°44'W8.00 Miles880 Yards01500K0Conway
 Brief Description: The Pope County tornado moved into Conway County about 2 miles west-southwest of Jerusalem at 338 pm CST and traveled northeastward. The tornado affected the northern and western parts of Jerusalem. West of town, a hog farm and tin shed were destroyed and a number of trees were blown down. As the tornado moved north of Jerusalem, a trailer was overturned and destroyed. One person in the trailer was injured. Thereafter, numerous trees were downed as the tornado moved through the Ozark National Forest. Damage along the tornado path was consistent with an F2 rating.
39.52008-02-05335°10'N / 92°59'W35°16'N / 92°51'W11.00 Miles1050 Yards51511.5M0KPope
 Brief Description: EVENT NARRATIVE: The tornado moved out of the Carden Bottoms area of Yell County, crossing the Arkansas River, and re-entering Pope County southwest of Atkins. The intensity and width of the tornado increased quickly within just a couple of miles after it moved across the Arkansas River. According to a survey by the Red Cross, damage included 46 houses destroyed, 19 houses with major damage, 37 houses with minor damage, and 2 other houses affected. In addition, 6 mobile homes were destroyed, 1 mobile home had major damage, and 4 others suffered minor damage. Several businesses were damaged as well. Numerous trees, power lines, and power poles were blown down. Several vehicles were blown off Interstate 40 as the tornado crossed the highway. One fatality occurred in the Lucky Landing area when a woman was thrown from her mobile home. Three fatalities, all members of a single family, occurred at a house on the east side of Atkins. Another fatality occurred in the Happy Bend community when a man left his mobile home and took shelter in a large, metal, intermodal shipping container. The container was blown hundreds of yards into the woods. The tornado then moved into Conway County, in the area west of Hattieville. EPISODE NARRATIVE: Early on the 5th, a strong storm system approached from the Plains. Ahead of the system, breezy southerly winds provided well above normal temperatures and abundant moisture. Warmth and moisture destabilized the atmosphere and fueled developing thunderstorms. A cold front moved across the state causing numerous severe storms and several tornadoes. One of the tornadoes tracked from Yell County to Sharp County, staying on the ground for 121.84 miles. This track length set a record for the longest tornado path ever recorded in Arkansas. The continuous track was confirmed by two National Weather Service meteorologists who flew the track with the Civil Air Patrol. The final track was based on ground surveys, the Civil Air Patrol flight, and an aerial mapping flight performed for the Arkansas Forestry Commission.
39.61951-10-23235°00'N / 93°30'W040K0Yell
39.72008-01-08235°24'N / 92°51'W35°27'N / 92°43'W8.00 Miles440 Yards011.8M0KConway
 Brief Description: EVENT NARRATIVE: The tornado from Pope County moved into northwestern Conway County. According to the Conway County Office of Emergency Management, three homes were destroyed, and 12 others suffered damage ranging from light to heavy. One woman was injured in a mobile home. Ten other structures, such as chicken houses and barns, were destroyed; 13 such structures were damaged. A church, which had stood for more than 100 years, was destroyed and an adjacent cemetery was damaged. Three natural gas well sites were damaged but there was no release of gas. The tornado moved into the Ozark National Forest, where hundreds of trees were blown down. Arkansas Governor Mike Beebe declared Conway County a state disaster area. The tornado continued into Van Buren County. EPISODE NARRATIVE: Severe thunderstorms affected a large part of Arkansas on the 8th. There were a number of reports of wind damage and an isolated tornado.
39.81960-04-14335°28'N / 94°17'W35°31'N / 94°03'W13.60 Miles833 Yards03250K0Crawford
40.21967-03-25235°08'N / 93°56'W1.00 Mile33 Yards050K0Logan
40.71956-02-14335°10'N / 93°00'W35°12'N / 92°51'W8.90 Miles300 Yards02250K0Pope
40.91980-04-07235°02'N / 94°03'W35°08'N / 93°42'W20.90 Miles200 Yards01250K0Logan
42.41960-05-05235°49'N / 94°12'W36°00'N / 94°00'W16.90 Miles33 Yards01250K0Washington
42.51955-11-15236°03'N / 94°00'W36°08'N / 93°45'W15.00 Miles220 Yards013K0Washington
42.61953-04-23335°29'N / 94°13'W003K0Crawford
42.91960-05-05236°07'N / 93°55'W36°09'N / 93°41'W13.20 Miles167 Yards0125K0Madison
43.41962-03-20236°09'N / 93°53'W36°07'N / 93°45'W7.80 Miles417 Yards00250K0Madison
43.51982-12-02335°29'N / 94°14'W1.00 Mile500 Yards00250K0Crawford
43.52005-11-27235°10'N / 92°53'W35°11'N / 92°51'W2.30 Miles250 Yards0000Pope
 Brief Description: A strong tornado moved out of Conway County and into Pope County about 5 miles south-southeast of Atkins. The tornado tracked across a rural part of the county with damage consisting of numerous downed trees and power lines. The tornado continued moving northeast and moved back into Conway County.
43.61997-03-01235°26'N / 92°43'W35°27'N / 92°42'W2.00 Miles880 Yards00100K0Van Buren
 Brief Description: The Conway County tornado moved into Van Buren County about 8 miles southwest of Scotland at 348 pm CST. The tornado traveled about 2 miles through the Ozark National Forest before lifting. Based on surveys of the timber damage, the tornado remained at F2 strength before it dissipated.
43.82008-02-05335°16'N / 92°51'W35°27'N / 92°37'W18.00 Miles1320 Yards2514.5M0KConway
 Brief Description: EVENT NARRATIVE: The tornado moved out of Pope County, northeast of Atkins, into Conway County, west of Hattieville. According to the Federal Emergency Management Agency, 56 residences (both houses and mobile homes) suffered damage. Altogether, 32 residences were destroyed, 6 had major damage, and 18 had minor damage. Several chicken houses were destroyed, and approximately 80,000 chickens were killed. Numerous trees, power lines, and power poles were blown down. An elderly couple was killed about 3.2 miles south-southwest of Cleveland when their mobile home was destroyed. The tornado then moved into Van Buren County, south-southeast of Beverage Town. EPISODE NARRATIVE: Early on the 5th, a strong storm system approached from the Plains. Ahead of the system, breezy southerly winds provided well above normal temperatures and abundant moisture. Warmth and moisture destabilized the atmosphere and fueled developing thunderstorms. A cold front moved across the state causing numerous severe storms and several tornadoes. One of the tornadoes tracked from Yell County to Sharp County, staying on the ground for 121.84 miles. This track length set a record for the longest tornado path ever recorded in Arkansas. The continuous track was confirmed by two National Weather Service meteorologists who flew the track with the Civil Air Patrol. The final track was based on ground surveys, the Civil Air Patrol flight, and an aerial mapping flight performed for the Arkansas Forestry Commission.
43.92005-11-27235°12'N / 92°52'W35°20'N / 92°42'W11.80 Miles250 Yards0000Conway
 Brief Description: The strong tornado moved out of Pope County and back into Conway County about one mile southwest of Blackwell. The tornado moved to the northeast, downing three wooden 115 kilovolt power structures. As the tornado crossed Interstate 40, it destroyed a liquor store at Blackwell. The tornado continued moving northeastward, damaging several houses. Several outbuildings were damaged or destroyed. Numerous trees and power lines were also knocked down. The tornado dissipated about 2.5 miles northeast of Saint Vincent.
43.91979-04-11235°16'N / 92°48'W35°19'N / 92°44'W5.40 Miles200 Yards00250K0Conway
44.11955-11-15235°02'N / 93°03'W1.50 Miles73 Yards00250K0Perry
44.12005-09-24235°23'N / 92°42'W35°23'N / 92°44'W1.00 Mile100 Yards0000Conway
 Brief Description: A strong tornado briefly touched down in northern Conway County. The tornado moved to the northwest around the remnants of Hurricane Rita. Estimated winds with the tornado were about 125 mph. All of the damage observed was on a hilltop. A double-wide mobile home, which had been tied down with tie-down straps, was destroyed. The home was blown across the highway, with much of the debris striking a church. The church itself had considerable damage. A sport utility vehicle also sustained some damage. The tornado was on the ground for about one mile before dissipating.
44.51956-02-14235°18'N / 92°45'W2.00 Miles500 Yards0025K0Conway
44.72005-11-27235°06'N / 92°54'W35°10'N / 92°52'W3.90 Miles250 Yards0000Conway
 Brief Description: A strong tornado touched down in southwest Conway County, about 9 miles west-southwest of Morrilton. Winds were estimated at 125 mph. Damage consisted of several damaged or destroyed outbuildings and a few homes with minor roof damage. A number of trees were also blown down. The tornado moved northeast into Pope County.
45.21984-10-16235°34'N / 94°22'W35°44'N / 94°10'W14.00 Miles50 Yards012.5M0Crawford
45.71961-03-12235°45'N / 92°51'W35°55'N / 92°35'W18.80 Miles833 Yards02250K0Searcy
46.21954-04-30336°02'N / 94°03'W36°06'N / 94°00'W5.40 Miles33 Yards00250K0Washington
46.61956-02-14335°21'N / 92°51'W35°24'N / 92°30'W20.00 Miles300 Yards13250K0Conway
46.92008-04-10236°00'N / 94°06'W36°02'N / 94°06'W3.00 Miles600 Yards00125K0KWashington
 Brief Description: EVENT NARRATIVE: An NWS storm survey determined that a strong tornado caused major damage to a permanent home, damaged several other homes, caused extensive tree damage, and snapped power poles. EPISODE NARRATIVE: Severe thunderstorms occurred across Northwest Arkansas during the evening and early morning hours on the 9th and 10th.
47.21954-04-30336°00'N / 94°10'W36°02'N / 94°03'W6.90 Miles33 Yards00250K0Washington
47.51973-04-20336°09'N / 93°09'W36°15'N / 93°05'W7.80 Miles500 Yards1192.5M0Boone
47.91991-03-21236°08'N / 93°01'W36°10'N / 92°58'W4.00 Miles100 Yards0122.5M0Boone
48.21954-04-30335°45'N / 94°19'W36°00'N / 94°10'W19.20 Miles440 Yards01250K0Washington
48.31996-04-21335°26'N / 94°21'W35°31'N / 94°17'W6.00 Miles1050 Yards049150.0M0Crawford
48.32010-04-30335°27'N / 92°43'W35°37'N / 92°30'W16.00 Miles700 Yards1154.0M0KVan Buren
 Brief Description: EVENT NARRATIVE: This tornado exited Conway County north of Cleveland and entered Van Buren County south-southeast of Liberty Springs. The tornado, rated EF3 in Van Buren County, caused extensive damage to the town of Scotland, especially in areas along Lo Gap Road. A 67 year-old woman was killed when she was thrown from her home. Approximately 15 others were injured. A damage assessment by the Arkansas Department of Emergency Management indicated 13 homes (including houses and mobile homes) destroyed, 3 homes with major damage, 7 homes with minor damage, and 11 homes affected. In addition, Scotland's community center was destroyed, and barns, outbuildings, and a gas well were damaged. Thousands of trees and numerous power lines were blown down. EPISODE NARRATIVE: Moisture from the Gulf of Mexico surged into Arkansas at the end of April, so conditions in the state became warm and humid. On the 30th, a strong area of low pressure aloft approached from the west, resulting in the development of thunderstorms. Wind shear, a change in wind direction and speed with height, was present. This created a favorable environment for the formation of tornadoes.
48.81982-12-23335°32'N / 92°39'W35°43'N / 92°33'W14.00 Miles500 Yards00250K0Saline
49.01961-05-08236°02'N / 92°48'W1.50 Miles33 Yards0025K0Searcy
49.21982-05-28235°14'N / 92°44'W35°15'N / 92°39'W4.50 Miles67 Yards10250K0Conway
49.71980-04-07234°51'N / 93°24'W34°52'N / 93°20'W4.10 Miles150 Yards00250K0Yell


* 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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