McDowell County
Population 16,878 (2025) 534 sq mi
Large wildfires have burned 64,198 acres of McDowell County since 1984, 6th most of 55 counties in West Virginia; the largest was the Bradshaw Fire in 1991.
Hazard fingerprint Each spoke is this county’s percentile among U.S. counties where that hazard occurs. How it is computed
- Tornado damage paths since 19502
- Tropical cyclone tracks within 100 miles since 1851, wider where stronger10
- Wildfire burn scars since 198439
- Major flood years since 19786
At a glance
The record for McDowell County in eight numbers. Each links to its section below.
Acres burned since 1984
64,198
6th of 55 in West Virginia
39 large fires; the largest was Bradshaw, 1991
DetailsTornadoes since 1950
2
26th of 55 in West Virginia
About as many as the typical West Virginia county
DetailsTropical cyclones within 50 mi
1
49th of 55 in West Virginia
None at hurricane strength since 1851
DetailsStrongest tornado
F1
May 12, 1975, 1.0 mile path
Strongest tropical cyclone
TS
Tropical storm Hugo, 1989, 3.0 miles away
Tornadoes
About one every 38 years since 1950, none rated F3/EF3 or stronger.
Strongest
May 12, 1975
F1, 1.0 mile path
100 yards wide.
Most recent
Monday, May 12, 1975
F1, 1.0 mile path
51 years ago.
Every recorded tornado
| May 12, 1975 | F1 | 1.0 | 0 | 0 |
| Apr 4, 1974 | F1 | 0.1 | 0 | 0 |
- Injuries and deaths are for the tornado’s whole path, which may extend beyond the county. Deaths recorded within McDowell County: 0.
- Weak tornadoes were under-recorded before Doppler radar coverage became national in the early 1990s, so earlier decades read low. Ratings use the Fujita scale before February 2007 and the Enhanced Fujita scale after.
Storm Prediction Center severe weather database, 1950 to 2025.
Hurricanes and tropical storms
1 passed within 50 miles since 1851; none at hurricane strength.
Strongest within 50 miles
September 22, 1989
Hugo, Tropical storm
3.0 miles at closest approach, winds near 55 mph.
Most recent
October 29, 2020
Zeta, Tropical storm
57.5 miles at closest approach.
Every storm within 100 miles
| Zeta | 2020 | 57.5 | Tropical storm |
| Hugo | 1989 | 3.0 | Tropical storm |
| Frederic | 1979 | 67.4 | Tropical storm |
| David | 1979 | 90.8 | Tropical storm |
| Audrey | 1957 | 74.6 | Tropical storm |
| Able | 1952 | 95.8 | Tropical storm |
| Unnamed | 1949 | 75.4 | Tropical storm |
| Unnamed | 1934 | 12.8 | Post-tropical |
| Unnamed | 1932 | 0.0 | Post-tropical |
| Unnamed | 1915 | 53.4 | Post-tropical |
| Unnamed | 1915 | 96.1 | Tropical storm |
| Unnamed | 1902 | 78.8 | Post-tropical |
| Unnamed | 1888 | 98.4 | Tropical storm |
| Unnamed | 1878 | 90.5 | Tropical storm |
- Tropical storms and hurricanes (34 kt or more, still tropical) at closest approach. Post-tropical remnants with gale-force winds are listed but not counted. Direct: track within 50 miles; near: within 100 miles. Distance is measured to the county boundary for counties and to the city centre for cities, using positions interpolated hourly between HURDAT2 fixes.
National Hurricane Center HURDAT2, 1851 to 2025.
Wildfire and smoke
64,198 acres burned in 39 large fires since 1984, equal to 19% of the land.
Largest
October 29, 1991
Bradshaw Fire, 5,025 acres
5,016 acres inside McDowell County.
Most recent
November 15, 2023
Hoover Camp Fire
1,633 acres in total.
Every large fire
| Hoover Camp Fire | 2023 | 312 | 1,633 |
| Trace Fork | 2015 | 552 | 784 |
| Mcdowell-2012-17 | 2012 | 600 | 607 |
| Peters Br/Little Jenny Br | 2001 | 964 | 964 |
| Bee Branch | 2001 | 1,257 | 1,257 |
| Mohawk Branch | 2001 | 520 | 520 |
| Puckett Ridge | 2001 | 2,291 | 2,288 |
| Coalwood | 2001 | 1,586 | 1,585 |
| Meathouse Fork | 2001 | 943 | 943 |
| Mountain Fork | 2001 | 4,393 | 4,389 |
| Mohawk Branch | 2001 | 565 | 566 |
| Crockett Branch | 2001 | 4,702 | 4,701 |
| Bartley | 2001 | 779 | 777 |
| Mile Branch | 2000 | 540 | 541 |
| Mullins Branch | 1999 | 22 | 3,148 |
| Harmon Branch | 1995 | 529 | 529 |
| Jim Branch | 1995 | 3,019 | 3,015 |
| Buffalo Creek | 1991 | 366 | 2,155 |
| Mud Lick Creek | 1991 | 2,819 | 7,103 |
| Johnson Hollow | 1991 | 2,978 | 2,987 |
| Bradshaw | 1991 | 5,016 | 5,025 |
| Beartown Branch | 1991 | 936 | 935 |
| Dry Fork | 1988 | 913 | 913 |
| Slate Creek | 1987 | 1,566 | 1,566 |
| War | 1987 | 1,121 | 1,122 |
| Browns Creek | 1987 | 1,129 | 1,130 |
| Sandy Huff Branch | 1987 | 2,188 | 4,016 |
| Raysal | 1987 | 2,658 | 2,660 |
| Kiwis Creek | 1987 | 4,879 | 4,873 |
| Fourpole Creek | 1987 | 1,216 | 1,214 |
| South Fork Of Tug River | 1987 | 3,489 | 3,487 |
| Panther Creek | 1987 | 695 | 693 |
| Snipe Branch | 1987 | 661 | 660 |
| Sams Branch | 1987 | 2,572 | 5,871 |
| Beartown Branch | 1987 | 939 | 937 |
| War Branch | 1987 | 908 | 1,146 |
| Davy Branch | 1987 | 966 | 966 |
| Wolfpen Branch | 1987 | 1,867 | 1,885 |
| Whetstone Branch | 1987 | 725 | 724 |
- Large fires mapped by the Monitoring Trends in Burn Severity program since 1984: 1,000 acres or more in the West, 500 or more in the East. Prescribed burns are excluded. Acres here are the part of each perimeter inside this place.
Monitoring Trends in Burn Severity (USGS and U.S. Forest Service), 1984 to 2026.
Smoke overhead
Smokiest year
2023: 50 days
Heavy smoke on 10 days in 2023, the most of any year.
Last 10 years
12.0 days a year
Medium or heavy smoke, 2016 to 2025.
2025
10 days
Medium or heavy smoke. 28 so far in 2026.
- A smoke day is a date on which a smoke plume traced by NOAA Hazard Mapping System analysts from satellite imagery covered this place's point (the county's population centre or the city centre). Counts here are of medium or heavy smoke. Since 2018 analysts have often drawn light smoke as one area over most of the continent, so light-smoke counts are not comparable from year to year. The plumes show smoke anywhere in the air above, not air quality at the ground, and smoke hidden by cloud is missed.
NOAA Hazard Mapping System smoke analysis, 2011 to 2026, retrieved October 30, 2026.
Floods and flood insurance
1,050 federal flood insurance claims since 1978, with $9.7 million paid.
Most claims in one year
2002: 319 claims
$3.8 million paid.
2nd most
1984: 157 claims
$420,000 paid.
3rd most
2001: 125 claims
$1.6 million paid.
Claims by ZIP code
| 24801 | 344 | $4.2 million |
| 24853 | 94 | $1.4 million |
| 24868 | 83 | $422,000 |
| 24813 | 76 | $384,000 |
| 24844 | 70 | $819,000 |
| 24892 | 62 | $131,000 |
| 24852 | 32 | $362,000 |
| 24817 | 23 | $85,000 |
| 24808 | 23 | $229,000 |
| 24836 | 20 | $83,000 |
| 24815 | 18 | $47,000 |
| 24850 | 17 | $104,000 |
| 24824 | 13 | $142,000 |
| 24897 | 12 | $67,000 |
| 24828 | 11 | $99,000 |
| 24888 | 10 | $30,000 |
| 24881 | 10 | $18,000 |
| 24872 | 10 | $253,000 |
| 24879 | 10 | $50,000 |
| 24884 | 9 | $18,000 |
| 24829 | 7 | $81,000 |
| 5 | $20,000 | |
| 24826 | 5 | $13,000 |
| 24832 | 5 | $60,000 |
| 24842 | 5 | $57,000 |
| 24861 | 5 | $16,000 |
| 24871 | 5 | $5,827 |
Flood events since 1996
- Flash Flood37
- Flood32
- Heavy Rain10
6 deaths recorded in flood events since 1996.
This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026. NOAA Storm Events through 2026.
River crests
Most severe crest
February 16, 2025
Tug Fork River at Litwar, 30.97 ft
6.97 feet above the 24.0 ft flood stage; major flooding by today’s categories.
Most recent moderate or major crest
February 16, 2025
Dry Fork (Tug Fork) at Bradshaw, 18.16 ft
Moderate flooding.
River gauges
| Dry Fork (Tug Fork) at Bradshaw | 10.0 | 18.16 ft | 0 |
| Panther Creek above Panther | 10.0 | 16.57 ft | 1 |
| Tug Fork River at Litwar | 24.0 | 30.97 ft | 1 |
| Tug Fork River at Welch | 17.0 | 22.10 ft | 2 |
- Crests are the highest and the recent crests the National Weather Service lists for each river gauge in the county that has a flood stage, not every flood. Flood categories use each gauge's current flood stages; crests from before levees, dams or channel changes may not be comparable. Crests measured on an old datum are left out of the rankings.
NOAA National Water Prediction Service gauge records, retrieved October 30, 2026.
Drought
In severe drought or worse for 99 of 1,581 months since 1895 (6%); the longest spell lasted 12 months.
99
Months in severe drought or worse since 1895
24
Months in extreme drought
6%
Share of all months, severe or worse
19
Drought reports to the Weather Service since 1996
Lowest reading
January 1931
−5.26, extreme drought
Longest severe spell
12 months
July 1930 to June 1931.
Latest month
September 2026
+1.47, slightly wet
Last severe month: April 2026.
- The Palmer Drought Severity Index is computed by NOAA each month from the county's average temperature and precipitation, relative to the county's own climate. Zero is normal; -3 or lower is severe drought and -4 or lower extreme drought. It describes the long-term balance of moisture, not water supply or crop losses.
NOAA NCEI nClimDiv county Palmer Drought Severity Index, 1895 to September 2026, issued October 6, 2026.
Earthquakes and landslides
5 earthquakes of magnitude 4 or more within 50 miles since 1900; the largest was magnitude 4.5 in 1969.
1
Magnitude 2.5+ inside the county since 1973
13
Magnitude 3+ within 50 miles since 1973
5
Magnitude 4+ within 50 miles since 1900
0
Magnitude 5+ within 50 miles since 1900
Largest within 50 miles
November 19, 1969
Magnitude 4.5
8 km ENE of Athens, West Virginia; 20.9 miles away, 1.9 miles deep.
Most recent, magnitude 3 or more
September 13, 2017
Magnitude 3.2
11 km NE of Peterstown, West Virginia; 33.5 miles away.
Every earthquake of magnitude 4 or more within 50 miles
| Nov 23, 2006 | 4.3 | 11.2 |
| Nov 2, 2006 | 4.3 | 7.1 |
| Apr 10, 1989 | 4.3 | 15.8 |
| Apr 14, 1988 | 4.1 | 8.1 |
| Nov 19, 1969 | 4.5 | 20.9 |
- Earthquakes of magnitude 2.5 or more in the USGS Comprehensive Catalog since 1900. Within 50 miles means the epicentre lies within 50 miles of the county boundary (or inside the county).
- Small earthquakes were under-recorded before the modern seismic networks of the 1970s and are still missed in remote areas, so early decades read low. Magnitudes are as the catalogue reports them and mix scales (moment, local and body-wave).
USGS ANSS Comprehensive Earthquake Catalog, 1900 to present, retrieved October 30, 2026.
Mapped landslides
2,624
Landslides mapped, probable or better
6
With a recorded date
2
Source inventories
Mapped by WV GS (2,618), NASA (6).
- Landslides mapped in the USGS compilation of landslide inventories across the United States (version 3.0, 2025), rated probable or better. The compilation joins inventories made by federal and state agencies for different purposes and areas, so the number mapped in a county reflects how closely it has been surveyed as much as how often its slopes fail. An area with few records may simply not have been mapped. Deaths are as recorded in the inventories; a slide listed in two inventories is counted once.
USGS Landslide Inventories across the United States, version 3.0, retrieved October 27, 2026.
Severe weather and other events
480 events in the National Weather Service record, 456 of them since 1996.
34
Hail reports, 1 inch or larger
6
Hail, 2 inches or larger
100
Damaging gusts, 58 mph+
86
Winter weather events since 1996
19
Heat events since 1996
29
Cold events since 1996
Largest hail
July 9, 1980
4.50 inches
Strongest measured or estimated gust
March 1, 2017
100 mph
More event types since 1996
| Lightning | 1 | 0 |
Costliest events since 1996
- May 2, 2002Flash Flood$85.0 million
National Weather Service narrative
Repetitive showers and thunderstorms moved rapidly across the southern coal fields, from the late morning hours to the early evening, on a Thursday, the 2nd of May. A few reports of large hail and gusty winds were received, but the major problem was the severe flash flooding in McDowell County. The heaviest rains were on the order of 2.5 to 5 inches, in a west to east corridor from northern Buchanan County, Virginia through central McDowell County. As a result, many more streams in McDowell County were flooded, compared to the 8th of July in 2001. In 2001, the downpours hit only the eastern portion of the county. Cooperative observers in Elkhorn measured 5.1 inches of rain, Welch…
- Jul 8, 2001Flash Flood$50.0 million
National Weather Service narrative
Streams that drain into the headwaters of the Tug Fork had severe flash flooding. This includes such streams as Elkhorn Creek and its North Fork. Some of the small communities hit hard were Landgraff, Jenkinjones, Anawalt, Kimball, Keystone, Eckman, Northfork, Maybeury, and Elkhorn. The remains of homes and other structures collected against the bridges, restricting the flow. The mayor of Northfork said, "Northfork hollow is wiped out. I've never seen anything like this in my lifetime". In Landgraff, water levels reached the tops of parked cars. In Keystone, the water crest left debris on the elevated tracks of the Norfolk Southern Railroad. The larger community of Welch measured…
- Feb 15, 2025Flood$5.0 million
National Weather Service narrative
The Tug Fork Fork River at Litwar exceeded its flood stage of 24 feet the night of February 15, then rose to a crest near 31 feet overnight. The river returned below flood stage the morning of the 16th. Major flooding impacted homes along the river between Iaeger and Panther, County Route 1, and several secondary roads.
- Feb 15, 2025Flash Flood$5.0 million
National Weather Service narrative
Major flash flooding occurred in and around Welch. Homes and businesses were surrounded by water, roads and underpasses became impassable, and cars were stranded. People became trapped in their vehicles on Riverside Drive before the Havaco bridge. In Kimball, water entered multiple homes, businesses, and cars. A vehicle with five occupants drove into floodwaters and was swept into the Tug Fork River. Two people were able to make it to safety while the other three occupants perished.
- May 9, 2009Flood$4.0 million
National Weather Service narrative
A large thunderstorm complex moved from eastern Kentucky into West Virginia during the late afternoon on the 8th. In the wake of that feature, a strong upper air disturbance helped refire convection over southern Kentucky. Those thunderstorms moved east into southern West Virginia just after dark. One of these cells had strong rotation in McDowell County. No tornadoes were observed, but wind damage was reported. ||The storms lost their rotation later that evening, but a narrow broken train of showers and thunderstorms continued to roll east out of Kentucky and into southern West Virginia after midnight, during the early morning hours of Saturday, May 9th. This west to east train…
- Jan 27, 1998Heavy Snow, Mcdowell$2.0 million
National Weather Service narrative
A surprise heavy wet snow fell over these mountainous counties. Since the environment was near the freezing mark, through a deep layer, a wide variation in snow depth was observed. The variation was based on elevation. Elevations above 2000 feet were impacted the most. At these elevations of Fayette, Raleigh, Wyoming, McDowell, and southern Nicholas Counties, a snow depth of 20 to 38 inches was left in the storm's wake. Meanwhile, in nearby river valleys and deep hollows, depths of 6 to 12 inches were more common. Further north, amounts of 6 to 12 inches were also more common across Randolph, Webster, Pocahontas, and northern Nicholas Counties. While the storm center was moving…
- Jun 12, 2010Flash Flood$1.5 million
National Weather Service narrative
Streams flowing into the headwaters of the Tug Fork across the northern portion of the county flooded many hollows. This would include streams flowing off Indian Ridge, such as Davy Branch around the communities as Asco and Yerba. Down stream of the junction of Davy Branch and the Left Fork of Davy Branch, the community of Davy was also hard hit. One resident said her concrete slab driveway and her vehicles were pushed around like pieces of paper. Nearby, another one of those small streams was Jenny Branch. ||Around Welch, streams such as Browns Creek damaged roads.||Preliminary accounts had 1 single family home and 15 mobile homes destroyed in the county. Major damage occurred to…
- Jul 12, 2022Flash Flood$1.0 million
National Weather Service narrative
Flash flooding isolated and/or damaged 40 to 45 homes and washed out road shoulders, a culvert and undermined parts of several roads in the communities of War, Warriormine and Berwind.
- Jun 29, 2012Thunderstorm Wind$750,000
National Weather Service narrative
Numerous trees and large branches were blown down. Two homes were destroyed, 5 had major damage, and 6 other dwellings sustained minor damage. The public infrastructure damage assessment was around $185,000.
- Dec 18, 2009Heavy Snow, Mcdowell$750,000
National Weather Service narrative
The mountain and the southern coal field counties were hit hard by heavy wet snow associated with a storm that moved out of the eastern Gulf of Mexico and across southern Georgia late Friday, the 18th. The storm then moved off the North Carolina coast early on the 19th. ||Heavy wet snow began over the southern mountains around Beckley after 1400E on the 18th. Meanwhile, the precipitation started as rain in the southwestern lowlands. The storm even started as rain, as far north as in the Tygart River Valley around Elkins about 1730E. In the Clarksburg vicinity the storm began mainly as snow around 2100E on the 18th. ||In about a 5 hour time span, 9 inches of snow had accumulated in…
- Storm Events records before 1996 cover only tornadoes, thunderstorm wind and hail. Damage figures are as reported by the National Weather Service at the time, not adjusted for inflation.
NOAA NCEI Storm Events Database, 1950 to 2026, issued October 26, 2026.
Weather records
From Grundy, 25 miles from the county’s population centre, with records from 1960.
- All-time high
- 102°FSep 15, 1998
- All-time low
- −17°F2 times, most recently Feb 21, 2015
- Warmest night
- 75°FJul 30, 1967
- Coldest day
- 4°FJan 11, 1982
- Wettest day
- 4.33 inFeb 16, 2025
- Snowiest day
- 15.0 inNov 25, 1950
- Hottest year
- 1967mean 59.0°F
- Coldest year
- 2014mean 52.2°F
- Wettest year
- 197262.22 in
- Driest year
- 198829.42 in
- Snowiest season
- 46.0 in1986-87
Median first snow
December 8
Earliest: October 30, 2012
Median last snow
March 12
Latest: April 19, 1983
1 of 56 winters had no measurable snow.
Station Grundy (USC00443640), 1,157 ft elevation, 25.0 miles from the population centre. Daily records from 1960 to October 22, 2026; 97.8% of days in the last 30 years are complete. Records at a single station can differ from a city’s official threaded record, which may combine several stations.
NOAA NCEI Global Historical Climatology Network Daily.
Federal disaster declarations
27 since 1953. The most recent: Severe Winter Storm, January 24, 2026.
| Jan 24, 2026 | Winter Storm | EM-3639-WV |
| Feb 26, 2025 | Severe Storm | DR-4861-WV |
| Nov 28, 2022 | Flood | DR-4678-WV |
| Apr 3, 2020 | Biological | DR-4517-WV |
| Mar 13, 2020 | Biological | EM-3450-WV |
| Mar 31, 2015 | Severe Storm | DR-4210-WV |
| Oct 29, 2012 | Hurricane | EM-3358-WV |
| Jul 23, 2012 | Severe Storm | DR-4071-WV |
| Jun 30, 2012 | Severe Storm | EM-3345-WV |
| Jun 24, 2010 | Flood | DR-1918-WV |
| Mar 2, 2010 | Snowstorm | DR-1881-WV |
| May 15, 2009 | Severe Storm | DR-1838-WV |
| May 1, 2007 | Severe Storm | DR-1696-WV |
| Sep 5, 2005 | Hurricane | EM-3221-WV |
| Jun 7, 2004 | Severe Storm | DR-1522-WV |
| Nov 21, 2003 | Severe Storm | DR-1500-WV |
| Jun 21, 2003 | Severe Storm | DR-1474-WV |
| Mar 14, 2003 | Severe Storm | DR-1455-WV |
| May 5, 2002 | Severe Storm | DR-1410-WV |
| Nov 16, 2001 | Fire | FM-2391-WV |
| Jun 3, 2001 | Severe Storm | DR-1378-WV |
| May 23, 1996 | Flood | DR-1115-WV |
| Jan 13, 1996 | Snowstorm | DR-1084-WV |
| Mar 17, 1993 | Snowstorm | EM-3109-WV |
| May 15, 1984 | Flood | DR-706-WV |
| Apr 7, 1977 | Flood | DR-531-WV |
| Aug 23, 1972 | Flood | DR-349-WV |
This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
OpenFEMA Disaster Declarations Summaries, retrieved October 30, 2026. Statewide declarations are not listed.
How this compares
Where McDowell County stands among 55 counties in West Virginia and 3,143 in the United States.
| Tornadoes since 1950 | 2 | 26 / 55 |
| Tornadoes rated F3/EF3 or stronger | 0 | — |
| Tropical cyclones within 50 mi | 1 | 49 / 55 |
| Hurricane-strength passes within 50 mi | 0 | — |
| Wildfire acres since 1984 | 64,198 | 6 / 55 |
| Flood insurance claims | 1,050 | 5 / 55 |
| Flood insurance paid | $9.7 million | 10 / 55 |
| Disaster declarations | 27 | 11 / 55 |
| Flood events since 1996 | 79 | 29 / 55 |
| Hail and wind events since 1996 | 221 | 21 / 55 |
| Winter storm events since 1996 | 86 | 22 / 55 |
| Reported damage since 1996 | $160 million | 1 / 55 |
| River crests at major flood stage | 4 | 22 / 55 |
| High tide flooding days a year, last 10 years | 0.0 | — |
| Months in severe drought since 1895 | 99 | 37 / 55 |
| Medium or heavy smoke days a year, last 10 years | 12.0 | 47 / 55 |
| Earthquakes M4+ within 50 mi since 1900 | 5 | 1 / 55 |
| Earthquakes M2.5+ in the county since 1973 | 1 | 7 / 55 |
Neighbouring counties
| Buchanan County VA | 1 | 1 |
| Mercer County | 2 | 1 |
| Mingo County | 1 | 3 |
| Tazewell County VA | 0 | 2 |
| Wyoming County | 1 | 1 |
Sources and vintage
Every number on this page comes from these public records.
- Tornadoes NOAA Storm Prediction Center severe weather database, through 2025.
- Tropical cyclones NOAA National Hurricane Center HURDAT2 (Atlantic; Northeast and Central Pacific), through 2025.
- Wildfire USGS/USFS Monitoring Trends in Burn Severity, through 2026.
- Storm events NOAA NCEI Storm Events Database, through 2026.
- Flood insurance OpenFEMA NFIP Redacted Claims v3, refreshed August 4, 2026.
- Declarations OpenFEMA Disaster Declarations Summaries v2, retrieved October 30, 2026.
- Weather records NOAA NCEI Global Historical Climatology Network Daily, station USC00443640.
- River crests NOAA National Weather Service, National Water Prediction Service river gauges, retrieved October 30, 2026.
- Drought NOAA NCEI nClimDiv county Palmer Drought Severity Index, through September 2026.
- Smoke NOAA NESDIS Hazard Mapping System smoke analysis, retrieved October 30, 2026.
- Landslides USGS Landslide Inventories across the United States, version 3.0 (2025).
- Earthquakes USGS ANSS Comprehensive Earthquake Catalog (ComCat), retrieved October 30, 2026.
Joins, thresholds and known limits are set out in the methodology. Found an error? Report it. Page built October 30, 2026.