Gogebic County

Population 14,285 (2025) 1,102 sq mi

Property owners in Gogebic County have filed 10 federal flood insurance claims since 1978, 58th most of 83 counties in Michigan.

Hazard fingerprint for Gogebic County Tornado: 10th percentile. Tropical: 0th percentile. Wildfire: 0th percentile. Flood: 19th percentile. Hail & wind: 17th percentile. Heat: 39th percentile. Cold: 93th percentile. Winter: 96th percentile. TORTROPFIREFLOODSEVEREHEATCOLDWINTER

Hazard fingerprint Each spoke is this county’s percentile among U.S. counties where that hazard occurs. How it is computed

2026
  • Tornado damage paths since 19505

At a glance

The record for Gogebic County in eight numbers. Each links to its section below.

Flood insurance claims

10

58th of 83 in Michigan

$38,000 paid since 1996

Details

Tornadoes since 1950

5

67th of 83 in Michigan

Fewer than the typical Michigan county, which has had 13

Details

Strongest tornado

EF1

July 11, 2016, 2.4 mile path

Federal disaster declarations

9

Most recent: Covid-19 Pandemic, 2020

Details

Record high

104°F

July 13, 1936

Details

Record low

−41°F

Reached 2 times, most recently January 17, 1982

Details

Snowiest season

301.8in

Winter of 1996-97

Costliest event since 1996

$20.0M

Flood, April 12, 2023

Details

Tornadoes

About one every 15 years since 1950, none rated F3/EF3 or stronger.

Strongest

July 11, 2016

EF1, 2.4 mile path

200 yards wide.

Most recent

Monday, July 11, 2016

EF1, 2.4 mile path

10 years ago.

Tornadoes by decade Doppler radar era² 1950s: 0 1960s: 0 1970s: 0 1980s: 2 2 1990s: 0 2000s: 1 1 2010s: 2 2 2020s: 0 1950s1960s1970s1980s1990s2000s2010s2020s
Recorded tornadoes per decade. The 2020s are incomplete.
Tornadoes by month J: 0 F: 0 M: 0 A: 1 M: 0 J: 1 J: 2 2 A: 1 S: 0 O: 0 N: 0 D: 0 JFMAMJJASOND
By month of occurrence, all years.

Every recorded tornado

Tornadoes in Gogebic County since 1950
Jul 11, 2016EF12.420000
Jul 11, 2016EF12.210000
Jun 5, 2005F10.35000
Aug 3, 1988F00.22000
Apr 27, 1984F10.23000
  1. Injuries and deaths are for the tornado’s whole path, which may extend beyond the county. Deaths recorded within Gogebic County: 0.
  2. 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

No tropical storm or hurricane has tracked within 100 miles since records began in 1851.

Wildfire and smoke

No large wildfire has been mapped here since satellite mapping began in 1984.

Smoke overhead

Smokiest year

2023: 85 days

Heavy smoke on 24 days in 2023, the most of any year.

Last 10 years

29.7 days a year

Medium or heavy smoke, 2016 to 2025.

2025

25 days

Medium or heavy smoke. 44 so far in 2026.

Days with medium or heavy smoke overhead, by year 2011: 8 2012: 15 2013: 13 2014: 12 2015: 21 2016: 4 2017: 17 2018: 23 2019: 17 2020: 15 2021: 49 2022: 19 2023: 85 85 2024: 43 2025: 25 201120122013201420152016201720182019202020212022202320242025
Days each year on which a satellite-traced plume of medium or heavy smoke covered the county’s population centre, 2011 to 2025.
  1. 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

10 federal flood insurance claims since 1996, with $38,000 paid.

Federal flood insurance claims by year
Claims per year since 1996. Years with fewer than five claims are not shown.

Claims by ZIP code

Flood insurance claims by ZIP code
499389$38,000

Flood events since 1996

  • Heavy Rain11
  • Flood9
  • Flash Flood6
  • Lakeshore Flood2

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 24, 1960

Black River near Bessemer, 14.27 ft

4.27 feet above the 10.0 ft flood stage; major flooding by today’s categories.

Most recent moderate or major crest

April 30, 2013

Black River near Bessemer, 12.23 ft

Moderate flooding.

Highest river crests above flood stage
Apr 24, 1960Black River near Bessemer14.27+4.27Major
Apr 17, 2002Black River near Bessemer13.54+3.54Moderate
Apr 30, 2013Black River near Bessemer12.23+2.23Moderate
May 12, 2003Black River near Bessemer12.16+2.16Moderate
Aug 16, 1972Black River near Bessemer11.73+1.73Minor
Apr 23, 2019Black River near Bessemer11.41+1.41Minor
Apr 12, 2023Black River near Bessemer11.38+1.38Minor
Apr 12, 2001Black River near Bessemer9.93−0.07Action
Apr 13, 1964Black River near Bessemer9.88−0.12Action
Apr 2, 1963Black River near Bessemer9.84−0.16Action
Jun 10, 1974Black River near Bessemer9.77−0.23Action
Apr 21, 1957Black River near Bessemer9.76−0.24Action
Apr 19, 2004Black River near Bessemer9.61−0.39Action
Apr 17, 1971Black River near Bessemer9.55−0.45Action
Jun 17, 2018Black River near Bessemer9.47−0.53Below flood stage
Apr 24, 2022Black River near Bessemer9.43−0.57Below flood stage
Mar 27, 2007Black River near Bessemer9.43−0.57Below flood stage
Mar 31, 1967Black River near Bessemer9.05−0.95Below flood stage
Apr 11, 2011Black River near Bessemer9.03−0.97Below flood stage
Mar 16, 2016Black River near Bessemer8.99−1.01Below flood stage
May 9, 2014Black River near Bessemer8.59−1.41Below flood stage
Apr 11, 1955Black River near Bessemer8.59−1.41Below flood stage
Apr 23, 1965Black River near Bessemer8.52−1.48Below flood stage
Apr 24, 1982Black River near Bessemer8.46−1.54Below flood stage
Apr 13, 1969Black River near Bessemer8.43−1.57Below flood stage

River gauges

River gauges and their highest listed crests
Black River near Bessemer10.014.27 ftApr 24, 19601
  1. 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 132 of 1,581 months since 1895 (8%); the longest spell lasted 19 months.

132

Months in severe drought or worse since 1895

53

Months in extreme drought

8%

Share of all months, severe or worse

Lowest reading

January 1977

−6.84, extreme drought

Longest severe spell

19 months

October 1947 to April 1949.

Latest month

September 2026

−4.89, extreme drought

Months in severe drought or worse, by year 1895: 0 1896: 1 1897: 0 1898: 6 1899: 0 1900: 0 1901: 0 1902: 0 1903: 0 1904: 0 1905: 0 1906: 0 1907: 3 1908: 6 1909: 1 1910: 7 1911: 6 1912: 0 1913: 0 1914: 0 1915: 0 1916: 0 1917: 0 1918: 0 1919: 0 1920: 0 1921: 2 1922: 0 1923: 0 1924: 0 1925: 4 1926: 1 1927: 0 1928: 0 1929: 0 1930: 0 1931: 2 1932: 0 1933: 5 1934: 3 1935: 0 1936: 1 1937: 0 1938: 0 1939: 2 1940: 1 1941: 0 1942: 0 1943: 0 1944: 0 1945: 0 1946: 0 1947: 3 1948: 12 12 1949: 4 1950: 0 1951: 0 1952: 0 1953: 0 1954: 0 1955: 0 1956: 0 1957: 0 1958: 0 1959: 0 1960: 0 1961: 0 1962: 0 1963: 3 1964: 2 1965: 0 1966: 0 1967: 0 1968: 0 1969: 0 1970: 0 1971: 0 1972: 0 1973: 0 1974: 0 1975: 0 1976: 5 1977: 2 1978: 0 1979: 0 1980: 0 1981: 0 1982: 0 1983: 0 1984: 0 1985: 0 1986: 0 1987: 5 1988: 6 1989: 4 1990: 6 1991: 0 1992: 0 1993: 0 1994: 0 1995: 0 1996: 0 1997: 0 1998: 2 1999: 0 2000: 0 2001: 0 2002: 0 2003: 0 2004: 0 2005: 0 2006: 2 2007: 6 2008: 0 2009: 2 2010: 2 2011: 0 2012: 0 2013: 0 2014: 0 2015: 0 2016: 0 2017: 0 2018: 0 2019: 0 2020: 0 2021: 4 2022: 1 2023: 3 2024: 5 2025: 0 18951905191519251935194519551965197519851995200520152025
Months each year with a Palmer index of −3 or lower, 1895 to 2025. Twelve means the whole year.
  1. 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 tsunamis

2 earthquakes of magnitude 2.5 or more within 50 miles since 1988; none reached magnitude 4.

0

Magnitude 2.5+ inside the county since 1973

1

Magnitude 3+ within 50 miles since 1973

0

Magnitude 4+ within 50 miles since 1900

0

Magnitude 5+ within 50 miles since 1900

Largest within 50 miles

January 14, 1988

Magnitude 3.6

21 km NNE of Marenisco, Michigan; 6.1 miles away, 3.1 miles deep.

Most recent, magnitude 3 or more

January 14, 1988

Magnitude 3.6

21 km NNE of Marenisco, Michigan; 6.1 miles away.

  1. 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).
  2. 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.

Tsunamis

On record

1 tsunami

Since 1811.

Tsunamis recorded here
Dec 16, 1811Ar: Ne - New Madrid Earthquakes, M8.5—10
  1. Places where NOAA's Global Historical Tsunami Database records a tsunami's water arriving, with the greatest height it reached above sea level at the time. Only tsunamis NOAA rates probable or definite are counted. Heights from eyewitness accounts and tide gauges are mixed, and older events are less completely recorded.

NOAA NCEI/WDS Global Historical Tsunami Database, retrieved October 30, 2026.

Severe weather and other events

681 events in the National Weather Service record, 658 of them since 1996.

33

Hail reports, 1 inch or larger

7

Hail, 2 inches or larger

117

Damaging gusts, 58 mph+

358

Winter weather events since 1996

6

Heat events since 1996

61

Cold events since 1996

Largest hail

July 28, 2006

4.00 inches

Strongest measured or estimated gust

July 26, 2021

90 mph

More event types since 1996

Other Storm Events types since 1996
Lightning211Jun 17, 2006
Dense fog and smoke400Apr 29, 2014

Costliest events since 1996

  1. Apr 12, 2023Flood$20.0 million
    National Weather Service narrative

    The Gogebic County Road Commission reported numerous secondary roads and a few county roads impassable from the 13th into the 17th. Highway M-28 east of Sunday Lake in Wakefield was closed from the 16th into the 21st due to high water. Estimated countywide damages to highway infrastructure were in the millions of dollars. Governor Whitmer declared a state of emergency in Gogebic County on April 14th due to severe and widespread flooding.

  2. Apr 14, 2002Flood, Gogebic$18.0 million
    National Weather Service narrative

    The record setting snowfall in February and March set the stage for flooding in April. During February and March of 2002, north-central and western parts of Upper Michigan received over 100 inches of snowfall. The snow pack held over 11 inches of water. The snow quickly melted during a 6 day period, 11-17 April 2002, releasing all that water into the creeks, streams. rivers and lakes. To exacerbate the situation, over 2 inches of rainfall occurred 10-12 April over much of Upper Michigan, and record high temperatures in the 70s and 80 were recorded on the 15th and 16th. During those two days, a dramatic snow melt occurred with nearly 2 feet of snow melting away. To complicate…

  3. Jul 11, 2016Flash Flood$5.0 million
    National Weather Service narrative

    Radar estimated rainfall amounts of 3 to 6 inches caused major flash flooding over portions of far western Gogebic County and left many sections of road washed out and impassible. Many people became stranded from near Ironwood to Little Girls Point. The Gogebic County Sheriff reported the Montreal River flooded on Lake Road at the Michigan-Wisconsin border with a washout of the guardrail at the Flint Creek ravine. A Gogebic County patrol car was swept up in the Montreal River flood waters and the deputy driving the car needed to be rescued.The Gogebic County Road Commission closed Lake Road from near Saxon Harbor, WI to Lower Powers Road.

  4. Jul 11, 2016Thunderstorm Wind$1.0 million
    National Weather Service narrative

    The NWS storm survey concluded that damage in and immediately surrounding Wakefield was caused by straight-line thunderstorm winds up to 90 mph. Wind damage included an overturned camper trailer, a roof ripped off an old skating rink, a few damaged or destroyed outbuildings, hundreds of large uprooted or snapped trees (some 30 to 40 inches in diameter), downed power lines, and several trees downed on houses or vehicles. The survey team could not access all areas around Wakefield due to the number of downed trees. The time of the report was based on radar, observations and interviews of individuals in the area.

  5. Apr 28, 2013Flood$1.0 million
    National Weather Service narrative

    Rapid melting of significant late season snow pack caused moderate flooding of roads in the Ironwood, Bessemer, Wakefield and Marenisco areas from the 28th into the 30th. Minor flooding continued into early May. Some flooding of basements was also reported. A portion of Highway M-28 was closed in Wakefield due to flooding from Sunday Lake. Governor Rick Snyder declared a state of disaster in Gogebic County where nearly one million dollars of property damage occurred due to the flooding mainly to roadway infrastructure.

  6. Jul 28, 2006Hail$750,000
    National Weather Service narrative

    Hail up to 4 inches in diameter resulted in significant damage to roofs, siding, and automobiles.

  7. Jun 15, 2018Flood$344,000
    National Weather Service narrative

    The Gogebic County Sheriff reported vehicles stranded on streets in Ironwood with multiple closures of roads due to flood waters, including Highway US-2 between Lowell Street and Douglas Boulevard. Multiple basements were also flooded in the Ironwood area with estimated rainfall reports between four and five inches. Governor Rick Snyder declared a state of disaster in Gogebic County as damage estimates from the flooding were estimated at nearly $344,000.

  8. Jul 11, 2016Tornado$100,000
    National Weather Service narrative

    The NWS storm survey confirmed a low end EF1 tornado about three miles south of Bessemer. Winds from the tornado were estimated around 90 mph. The tornado touched down near the intersection of S. Barber Road and Spruce Road and ended 2.4 miles to the east-northeast, just northeast of the intersection of W. Harding Road and Koski Road. Damage included multiple trees down on a garage on Spruce Street and half a barn destroyed in Bessemer Township on Elder Street. |||The damage path was 200 yards wide or less and occurred just before midnight CDT.

  9. Jul 26, 2021Thunderstorm Wind$100,000
    National Weather Service narrative

    Extensive straight-line wind damage was found in and around the town of Marenisco with estimated wind speeds up to 90 mph. Some structural damage was found, but most of the damage was uprooted or snapped trees. The main structural damage was significant roof damage to a newly-built garage at the corner of Hall and Mill Streets in Marenisco where over a quarter of the metal roof and decking was stripped back and torn from the roof trusses. A continuous swath of straight-line wind damage started approximately five miles west of town to six miles southeast of town and continued into the Ottawa National Forest. Campers were trapped at Bobcat Lake Campground due to fallen trees, but no…

  10. Apr 26, 2017Ice Storm, Gogebic$100,000
    National Weather Service narrative

    There were several public reports of moderate to heavy ice accumulation from freezing rain over the higher terrain around Bessemer and Wakefield. The coating of ice caused treacherous road conditions and extensive tree damage over the higher elevations of the county, mainly north of Bessemer and Wakefield.

  1. 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 Ironwood, 9.4 miles from the county’s population centre, with records from 1901.

All-time high
104°FJul 13, 1936
All-time low
−41°F2 times, most recently Jan 17, 1982
Warmest night
80°FJul 21, 1901
Coldest day
−22°FJan 19, 1994
Wettest day
6.72 inJul 21, 1909
Snowiest day
22.1 inDec 10, 2009
Hottest year
1931mean 46.4°F
Coldest year
1917mean 35.3°F
Wettest year
201353.37 in
Driest year
190717.75 in
Snowiest season
301.8 in1996-97
Average monthly high and low temperature and precipitation, last 30 years, Ironwood 32°F 20° 4° 2.1 Jan 25° 5° 1.6 Feb 36° 14° 2.4 Mar 48° 28° 3.4 Apr 63° 41° 3.6 May 73° 51° 4.0 Jun 77° 56° 3.8 Jul 75° 54° 3.6 Aug 68° 47° 3.6 Sep 54° 36° 3.7 Oct 38° 24° 2.9 Nov 26° 11° 2.6 Dec Precipitation, inches
Average daily high and low by month, and average monthly precipitation, over the last 30 years.
Nights at or below freezing per year 1976: 216 216 1977: 175 1978: 196 1979: 202 1981: 204 1982: 187 1983: 198 1984: 193 1985: 184 1986: 181 1987: 179 1988: 194 1989: 196 1990: 185 1991: 193 1992: 200 1993: 208 1994: 181 1995: 197 1996: 194 1997: 199 1998: 162 1999: 175 2000: 183 2001: 172 2002: 207 2003: 193 2004: 184 2005: 169 2006: 187 2007: 173 2008: 184 2009: 189 2010: 168 2011: 190 2012: 172 2013: 203 2014: 187 2015: 172 2016: 167 2017: 193 2018: 199 2019: 188 2020: 202 2021: 178 2022: 186 2023: 176 2024: 165 2025: 185 19761987199720072017
Nights at or below freezing each complete year, last 50 years. Thirty-year average: 183.4.
Snowfall by winter 1976: 194.0 in 1977: 168.5 in 1978: 153.2 in 1979: 150.0 in 1980: 158.1 in 1981: 192.6 in 1982: 196.2 in 1983: 169.9 in 1984: 166.7 in 1985: 170.6 in 1986: 107.3 in 1987: 165.7 in 1988: 216.8 in 1989: 237.3 in 1990: 123.2 in 1991: 185.0 in 1992: 157.6 in 1993: 151.8 in 1994: 150.0 in 1995: 291.9 in 1996: 301.8 in 301.8 1997: 141.5 in 1998: 144.1 in 1999: 157.0 in 2000: 298.1 in 2001: 261.7 in 2002: 200.2 in 2003: 196.0 in 2004: 170.8 in 2006: 202.3 in 2007: 169.5 in 2008: 188.9 in 2009: 170.6 in 2010: 169.2 in 2018: 182.8 in 2019: 169.3 in 2020: 84.4 in 2021: 182.3 in 2022: 254.3 in 2023: 67.7 in 2024: 163.2 in 2025: 193.4 in 19761986199620072024
Total snowfall each winter (July to June), last 50 winters.

Median first snow

October 20

Earliest: September 21, 1913

Median last snow

April 25

Latest: May 28, 1965

0 of 111 winters had no measurable snow.

Station Ironwood (USC00204104), 1,430 ft elevation, 9.4 miles from the population centre. Daily records from 1901 to October 27, 2026; 99.5% 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

9 since 1953. The most recent: Covid-19 Pandemic, March 27, 2020.

Federal disaster declarations
Mar 27, 2020BiologicalCovid-19 PandemicMajor disasterDR-4494-MI
Mar 13, 2020BiologicalCovid-19EmergencyEM-3455-MI
Aug 2, 2018FloodSevere Storms, Flooding, Landslides, and MudslidesMajor disasterDR-4381-MI
Jun 18, 2013FloodFloodingMajor disasterDR-4121-MI
Sep 7, 2005HurricaneHurricane Katrina EvacuationEmergencyEM-3225-MI
May 6, 2002FloodFloodingMajor disasterDR-1413-MI
May 10, 1994FreezingSevere Deep FreezeMajor disasterDR-1028-MI
Jan 27, 1978SnowstormBlizzards & SnowstormsEmergencyEM-3057-MI
Mar 2, 1977DroughtDroughtEmergencyEM-3035-MI

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 Gogebic County stands among 83 counties in Michigan and 3,143 in the United States.

Ranks
Tornadoes since 1950567 / 832,612 / 3,143
Tornadoes rated F3/EF3 or stronger0——
Tropical cyclones within 50 mi0——
Hurricane-strength passes within 50 mi0——
Wildfire acres since 19840——
Flood insurance claims1058 / 832,332 / 3,143
Flood insurance paid$38,00065 / 832,542 / 3,143
Disaster declarations939 / 832,860 / 3,143
Flood events since 19962816 / 832,188 / 3,143
Hail and wind events since 199619835 / 831,978 / 3,143
Winter storm events since 19963586 / 83124 / 3,143
Reported damage since 1996$47.0 million25 / 83873 / 3,143
River crests at major flood stage122 / 831,446 / 3,143
High tide flooding days a year, last 10 years0.0——
Months in severe drought since 189513230 / 831,411 / 3,143
Medium or heavy smoke days a year, last 10 years29.74 / 83229 / 3,143
Earthquakes M4+ within 50 mi since 19000——
Earthquakes M2.5+ in the county since 19730——

Neighbouring counties

Neighbouring counties
Iron County WI7002
Iron County9003
Ontonagon County3009
Vilas County WI16000

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 USC00204104.
  • 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.
  • Tsunamis NOAA NCEI/WDS Global Historical Tsunami Database.
  • 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.