Floyd County
Population 34,401 (2025) 393 sq mi
Large wildfires have burned 127,230 acres of Floyd County since 1984, 2nd most of 120 counties in Kentucky; the largest was the Unnamed Fire in 1987.
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 stronger5
- Wildfire burn scars since 198429
- Major flood years since 19788
At a glance
The record for Floyd County in eight numbers. Each links to its section below.
Acres burned since 1984
127,230
2nd of 120 in Kentucky
29 large fires; the largest was Unnamed, 1987
DetailsTropical cyclones within 50 mi
3
6th of 120 in Kentucky
None at hurricane strength since 1851
DetailsTornadoes since 1950
2
109th of 120 in Kentucky
Fewer than the typical Kentucky county, which has had 10
DetailsStrongest tornado
EF1
April 4, 2011, 0.4 mile path
Strongest tropical cyclone
TS
Tropical storm Hugo, 1989, 43.8 miles away
Tornadoes
About one every 38 years since 1950, none rated F3/EF3 or stronger.
Strongest
April 4, 2011
EF1, 0.4 mile path
100 yards wide.
Most recent
Monday, April 4, 2011
EF1, 0.4 mile path
15 years ago.
Every recorded tornado
| Apr 4, 2011 | EF1 | 0.4 | 0 | 0 |
| Sep 9, 1970 | F1 | 0.1 | 2 | 0 |
- Injuries and deaths are for the tornado’s whole path, which may extend beyond the county. Deaths recorded within Floyd 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
3 passed within 50 miles since 1851; none at hurricane strength.
Strongest within 50 miles
September 22, 1989
Hugo, Tropical storm
43.8 miles at closest approach, winds near 52 mph.
Most recent
October 29, 2020
Zeta, Tropical storm
94.2 miles at closest approach.
Every storm within 100 miles
- 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
127,230 acres burned in 29 large fires since 1984, equal to 51% of the land.
Largest
November 13, 1987
Unnamed Fire, 38,296 acres
8,174 acres inside Floyd County.
Most recent
April 17, 2023
Rockhouse Fork Fire
939 acres in total.
Every large fire
| Rockhouse Fork | 2023 | 219 | 939 |
| Clark Branch #2 | 2019 | 1,210 | 1,311 |
| Spruce Pine Rd St Rt 7 | 2016 | 221 | 787 |
| Unnamed | 2006 | 584 | 586 |
| Unnamed | 2001 | 666 | 2,471 |
| Unnamed | 2001 | 1,109 | 1,109 |
| Unnamed | 2001 | 554 | 555 |
| Unnamed | 2001 | 5,169 | 8,289 |
| Unnamed | 2001 | 1,706 | 3,351 |
| Unnamed | 2001 | 1,836 | 5,327 |
| Unnamed | 1999 | 2,110 | 2,109 |
| Unnamed | 1999 | 1,686 | 17,323 |
| Unnamed | 1999 | 2,269 | 8,143 |
| Unnamed | 1999 | 502 | 503 |
| Unnamed | 1999 | 1,835 | 17,757 |
| Unnamed | 1998 | 727 | 728 |
| Unnamed | 1995 | 3,629 | 4,257 |
| Unnamed | 1995 | 2,800 | 3,198 |
| Unnamed | 1995 | 3,544 | 3,546 |
| Unnamed | 1991 | 2,163 | 2,164 |
| Unnamed | 1991 | 4,779 | 4,778 |
| Unnamed | 1991 | 57 | 4,980 |
| Unnamed | 1991 | 6,781 | 7,180 |
| Unnamed | 1991 | 7,472 | 17,401 |
| Unnamed | 1987 | 8,174 | 38,296 |
| Unnamed | 1987 | 51,350 | 66,322 |
| Unnamed | 1987 | 1,505 | 4,063 |
| Unnamed | 1987 | 1,161 | 20,990 |
| Unnamed | 1987 | 11,397 | 13,118 |
- 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: 53 days
Heavy smoke on 9 days in 2023, the most of any year.
Last 10 years
13.3 days a year
Medium or heavy smoke, 2016 to 2025.
2025
12 days
Medium or heavy smoke. 31 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
2,618 federal flood insurance claims since 1978, with $37.3 million paid.
Most claims in one year
1984: 553 claims
$6.1 million paid.
2nd most
2003: 280 claims
$2.7 million paid.
3rd most
2025: 223 claims
$8.8 million paid.
Claims by ZIP code
| 41653 | 436 | $6.7 million |
| 41649 | 422 | $6.2 million |
| 41630 | 302 | $3.8 million |
| 41666 | 265 | $3.9 million |
| 41645 | 170 | $2.6 million |
| 41640 | 118 | $1.3 million |
| 41601 | 113 | $1.7 million |
| 41647 | 97 | $2.3 million |
| 41635 | 93 | $828,000 |
| 41655 | 70 | $533,000 |
| 41643 | 63 | $526,000 |
| 41619 | 50 | $466,000 |
| 43 | $307,000 | |
| 41605 | 43 | $987,000 |
| 41642 | 36 | $974,000 |
| 41636 | 34 | $402,000 |
| 41659 | 30 | $275,000 |
| 41622 | 29 | $488,000 |
| 41603 | 27 | $414,000 |
| 41627 | 22 | $54,000 |
| 41602 | 22 | $279,000 |
| 41612 | 19 | $365,000 |
| 41621 | 17 | $235,000 |
| 41216 | 14 | $826,000 |
| 41651 | 13 | $158,000 |
| 41631 | 11 | $78,000 |
| 41606 | 9 | $51,000 |
| 41668 | 8 | $39,000 |
| 41663 | 6 | $62,000 |
| 41625 | 5 | $48,000 |
| 41604 | 5 | $42,000 |
Flood events since 1996
- Flash Flood112
- Flood86
- Heavy Rain11
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
April 6, 1977
Levisa Fork at Prestonsburg, 45.71 ft
5.71 feet above the 40.0 ft flood stage; moderate flooding by today’s categories.
Most recent moderate or major crest
February 17, 2025
Levisa Fork at Prestonsburg, 43.37 ft
Moderate flooding.
| Apr 6, 1977 | Levisa Fork at Prestonsburg | 45.71 | +5.71 |
| May 7, 1984 | Levisa Fork at Prestonsburg | 43.88 | +3.88 |
| Feb 17, 2025 | Levisa Fork at Prestonsburg | 43.37 | +3.37 |
| Mar 2, 2021 | Levisa Fork at Prestonsburg | 40.50 | +0.50 |
| Feb 17, 2003 | Levisa Fork at Prestonsburg | 39.88 | −0.12 |
| Mar 9, 1955 | Johns Creek at Dewey Lake | 682.32 | −3.68 |
River gauges
| Johns Creek at Dewey Lake | 686.0 | 682.32 ft | 0 |
| Levisa Fork at Prestonsburg | 40.0 | 45.71 ft | 0 |
- 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 120 of 1,581 months since 1895 (8%); the longest spell lasted 19 months.
120
Months in severe drought or worse since 1895
37
Months in extreme drought
8%
Share of all months, severe or worse
3
Drought reports to the Weather Service since 1996
Lowest reading
January 1931
−6.21, extreme drought
Longest severe spell
19 months
November 1940 to May 1942.
Latest month
September 2026
−1.13, mild drought
Last severe month: December 2007.
- 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
6 earthquakes of magnitude 4 or more within 50 miles since 1900; the largest was magnitude 4.3 in 2006.
0
Magnitude 2.5+ inside the county since 1973
13
Magnitude 3+ within 50 miles since 1973
6
Magnitude 4+ within 50 miles since 1900
0
Magnitude 5+ within 50 miles since 1900
Largest within 50 miles
November 23, 2006
Magnitude 4.3
13 km NW of Raven, Virginia; 38.8 miles away, 0.0 miles deep.
Most recent, magnitude 3 or more
December 16, 2024
Magnitude 3.1
1 km NW of Chesapeake, Ohio; 49.9 miles away.
Every earthquake of magnitude 4 or more within 50 miles
| Nov 10, 2012 | 4.2 | 20.3 |
| Nov 23, 2006 | 4.3 | 38.8 |
| Nov 2, 2006 | 4.3 | 40.5 |
| Aug 17, 1990 | 4.0 | 43.4 |
| Apr 10, 1989 | 4.3 | 34.9 |
| Apr 14, 1988 | 4.1 | 36.2 |
- 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
2,097
Landslides mapped, probable or better
83
With a recorded date
2
Source inventories
Mapped by KY GS (2,079), NASA (18).
- 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
744 events in the National Weather Service record, 718 of them since 1996.
45
Hail reports, 1 inch or larger
3
Hail, 2 inches or larger
199
Damaging gusts, 58 mph+
150
Winter weather events since 1996
8
Heat events since 1996
15
Cold events since 1996
Largest hail
April 9, 2011
2.75 inches
Strongest measured or estimated gust
March 31, 2025
96 mph
More event types since 1996
| Lightning | 3 | 0 |
| Dense fog and smoke | 1 | 0 |
| Debris flows | 4 | 0 |
Costliest events since 1996
- Aug 3, 2001Flash Flood$7.6 million
National Weather Service narrative
High water from the areas worst flash flooding in years took its toll on area roads, bridges and homes. Extensive damage resulted in the county, making it one of five in the area to be classified as a Presidentially declared disaster area. Up to 1200 homes were affected by the flash flood. All of the Left Beaver and Mud Creek area from Martin south to the end of the county was the hardest hit. Most of the southern part of the county was without commercial utilities for several days after the flash flood.Several shelters were opened and more than 50 people stayed at the Mud Creek Senior Center, more were housed at Allen Central High School and other locations. Officials reported…
- May 31, 2004Flood, Floyd$4.0 million
National Weather Service narrative
On the afternoon of May 30th, a warm front was draped across eastern Kentucky. With extremely moist and unstable air, this boundary helped spark the beginning of a most unusual event for eastern Kentucky, and for that matter, for the country. Countless supercell thunderstorms developed along this boundary for hours on end, causing widespread tree damage and damage to structures. Flash flooding was also occurring with these storms which contained torrential rain. Unfortunately for eastern Kentucky, this was not the end to the severe weather or the flooding. Later in the night, mostly in the early hours of May 31st, a potent cold front burst through, bringing destruction to most if…
- Jun 1, 2004Flood, Floyd$3.0 million
National Weather Service narrative
This event is actually a continuation of a flooding event which started on May 31st. Many roads were washed out, homes destroyed, and automobiles ruined. Some people were stranded in their own homes and had to be rescued.
- Jun 16, 2003Flash Flood$1.2 million
National Weather Service narrative
Flood waters damaged several county roads, drains, and bridges. Water was flowing across Kentucky Highway 114 near Dotson. A couple of house trailers were submerged in flood waters. There were also several mudslides in the area.
- Aug 22, 2014Flash Flood$1.0 million
National Weather Service narrative
Severe flash flooding occurred across parts of Floyd County as three to four inches of rain fell in one to two hours. Flash flood reports first came in from Lancer where eight inches to a foot of water was flowing across a roadway. Flood waters was reported to have entered homes and vehicles along Spradlin Branch and Mays Branch near Prestonsburg and Main Street and North Lake Drive were closed in downtown Prestonsburg. Highway 1427 was washed out by flood waters and the Creekside Subdivision near the confluence of Potts Branch and Abbott Creek was evacuated due to rising water. Flood water washed partially washed out the road at the junction of Highway 979 and 1426 near Harold.…
- May 2, 2002Flood, Floyd$750,000
National Weather Service narrative
Heavy rains fell across the Big Sandy and Kentucky River basins, primarily on Thursday, May 2. This resulted in excessive runoff and flooding in four eastern Kentucky counties. At 11 p.m EDT on May 2. in Pike County, a 24 year old man from Freeburn, KY was swept away in river flood water after his vehicle was stranded in the Tug Fork of the Big Sandy River at the Vulcan Bridge area on Kentucky Highway 194.At 5 a.m EDT on May 3, the North Fork of the Kentucky River at Booneville, KY in Owsley County went above flood stage of 27 feet, and continued above flood stage until 1 p.m EDT. May 3, with a crest of 27.75 feet.At approximately 6:30 a.m EDT on May 3, reports from Martin County…
- Apr 18, 1998Flash Flood$165,000
National Weather Service narrative
From April 18 to 19, most of southeast Kentucky received 1 to 3 inches of rain, but some spots received 3 to 5 inches. The heavy rain resulted in widespread flash flooding, small stream flooding, and eventually river flooding. Numerous roads were flooded, or blocked by mud and rock slides. Flooding was especially severe along the Right and Left Forks of Beaver Creek in Floyd County. Approximately 229 homes were affected by the flash flooding in Floyd County, and numerous residents had to be evacuated.
- May 29, 2019Thunderstorm Wind$155,000
National Weather Service narrative
A National Weather Service Meteorologist surveyed localized downburst winds in Prestonsburg. These winds caused sporadic damage throughout the community. The highest wind gust estimated was in downtown Prestonsburg on West Court Street |where one half of the roof of a hock shop building was lifted off. This roof landed on West Court Street, including on multiple vehicles, fatally wounding one person in a moving vehicle. Glass was also broken on multiple windows on the north side of the building. There were a number of other buildings and homes with minor roof |or gutter damage nearby, as well as a couple of uprooted trees near the downtown area. A HAM radio tower that had been…
- Jan 17, 2012Thunderstorm Wind$100,000
National Weather Service narrative
Trees were blown down throughout the county. Several trees were snapped or uprooted and power lines were downed along Hwy 114 and in Rough and Tough Branch in and near the community of Dotson. A billboard was also severely damaged due to the winds. The local VFD reported several transformer fires due to the downed trees and power lines.
- Apr 15, 2007Flash Flood$100,000
National Weather Service narrative
Multiple homes flooded. One family rescued from their home.
- 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 Paintsville 1E, 18.1 miles from the county’s population centre, with records from 1972.
- All-time high
- 105°F2 times, most recently Aug 17, 1988
- All-time low
- −26°FJan 18, 1994
- Warmest night
- 79°FAug 12, 1985
- Coldest day
- −6°FJan 20, 1985
- Wettest day
- 5.10 inNov 28, 1973
- Snowiest day
- 14.5 in2 times, most recently Jan 23, 2016
- Hottest year
- 2024mean 57.0°F
- Coldest year
- 2014mean 53.1°F
- Wettest year
- 195063.06 in
- Driest year
- 196331.19 in
- Snowiest season
- 34.6 in1963-64
Median first snow
December 12
Earliest: November 3, 1954
Median last snow
March 4
Latest: April 21, 1953
1 of 70 winters had no measurable snow.
Station Paintsville 1E (USC00156136), 630 ft elevation, 18.1 miles from the population centre. Daily records from 1972 to September 29, 2026; 88.6% 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
48 since 1953. The most recent: Severe Winter Storm, January 24, 2026.
| Jan 24, 2026 | Winter Storm | EM-3633-KY |
| Apr 24, 2025 | Severe Storm | DR-4864-KY |
| Apr 3, 2025 | Severe Storm | EM-3626-KY |
| Feb 24, 2025 | Severe Storm | DR-4860-KY |
| Feb 16, 2025 | Severe Storm | EM-3624-KY |
| May 9, 2023 | Flood | DR-4711-KY |
| Apr 10, 2023 | Severe Storm | DR-4702-KY |
| Jul 29, 2022 | Flood | DR-4663-KY |
| Feb 27, 2022 | Severe Storm | DR-4643-KY |
| Apr 23, 2021 | Flood | DR-4595-KY |
| Mar 31, 2021 | Severe Ice Storm | DR-4592-KY |
| Mar 28, 2020 | Biological | DR-4497-KY |
| Mar 13, 2020 | Biological | EM-3469-KY |
| Apr 17, 2019 | Severe Storm | DR-4428-KY |
| Apr 12, 2018 | Flood | DR-4358-KY |
| Aug 12, 2015 | Severe Storm | DR-4239-KY |
| May 12, 2015 | Flood | DR-4218-KY |
| May 1, 2015 | Flood | DR-4217-KY |
| Apr 30, 2015 | Snowstorm | DR-4216-KY |
| Sep 30, 2014 | Severe Storm | DR-4196-KY |
| May 4, 2011 | Severe Storm | DR-1976-KY |
| May 29, 2009 | Severe Storm | DR-1841-KY |
| Feb 5, 2009 | Severe Ice Storm | DR-1818-KY |
| Jan 28, 2009 | Severe Ice Storm | EM-3302-KY |
| May 25, 2007 | Severe Storm | DR-1703-KY |
| Sep 10, 2005 | Hurricane | EM-3231-KY |
| Jun 10, 2004 | Severe Storm | DR-1523-KY |
| Jul 2, 2003 | Severe Storm | DR-1475-KY |
| Mar 14, 2003 | Severe Storm | DR-1454-KY |
| May 7, 2002 | Severe Storm | DR-1414-KY |
| Apr 4, 2002 | Severe Storm | DR-1407-KY |
| Nov 2, 2001 | Fire | FM-2386-KY |
| Aug 15, 2001 | Severe Storm | DR-1388-KY |
| Nov 4, 2000 | Fire | FM-2350-KY |
| Nov 20, 1999 | Fire | FM-2288-KY |
| Apr 29, 1998 | Severe Storm | DR-1216-KY |
| Mar 4, 1997 | Severe Storm | DR-1163-KY |
| Jan 13, 1996 | Snowstorm | DR-1089-KY |
| Jun 13, 1995 | Tornado | DR-1055-KY |
| Mar 16, 1994 | Snowstorm | DR-1018-KY |
| Mar 16, 1993 | Snowstorm | EM-3104-KY |
| Oct 30, 1989 | Flood | DR-846-KY |
| Jun 30, 1989 | Flood | DR-834-KY |
| Feb 24, 1989 | Flood | DR-821-KY |
| May 15, 1984 | Severe Storm | DR-705-KY |
| Apr 6, 1977 | Flood | DR-529-KY |
| May 15, 1972 | Flood | DR-332-KY |
| Mar 27, 1967 | Flood | DR-226-KY |
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 Floyd County stands among 120 counties in Kentucky and 3,143 in the United States.
| Tornadoes since 1950 | 2 | 109 / 120 |
| Tornadoes rated F3/EF3 or stronger | 0 | — |
| Tropical cyclones within 50 mi | 3 | 6 / 120 |
| Hurricane-strength passes within 50 mi | 0 | — |
| Wildfire acres since 1984 | 127,230 | 2 / 120 |
| Flood insurance claims | 2,618 | 2 / 120 |
| Flood insurance paid | $37.3 million | 3 / 120 |
| Disaster declarations | 48 | 5 / 120 |
| Flood events since 1996 | 209 | 2 / 120 |
| Hail and wind events since 1996 | 327 | 13 / 120 |
| Winter storm events since 1996 | 150 | 5 / 120 |
| Reported damage since 1996 | $19.9 million | 36 / 120 |
| River crests at major flood stage | 0 | — |
| High tide flooding days a year, last 10 years | 0.0 | — |
| Months in severe drought since 1895 | 120 | 73 / 120 |
| Medium or heavy smoke days a year, last 10 years | 13.3 | 100 / 120 |
| Earthquakes M4+ within 50 mi since 1900 | 6 | 16 / 120 |
| Earthquakes M2.5+ in the county since 1973 | 0 | — |
Neighbouring counties
| Johnson County | 4 | 4 |
| Knott County | 1 | 2 |
| Magoffin County | 3 | 2 |
| Martin County | 1 | 3 |
| Pike County | 2 | 2 |
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 USC00156136.
- 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.