EveryQuake

Earthquakes in Montana

85,412 earthquakes catalogued in and around Montana between 1909 and 2026. Recorded measurements; not a forecast.

Last updated 4 August 2026 · merged from 5 catalogues
0.9
Latest earthquake · depth 5.2 km
03.08.2026 17:35 UTC · from centre 261 km
85,412
recorded earthquakes
M7.3
largest
1909–2026
record span
1.11
mean magnitude
77,312
epicentre inside the border

By year

Stacked by magnitude; one column per year.

0310962181909: 1 (M5+)19091910: 1 (M5+)1916: 1 (M5+)19181925: 5 (M5+)1926: 1 (M5+)19271928: 1 (M4–5)1929: 1 (M4–5)1935: 1 (M3–4)1935: 4 (M5+)19361943: 1 (M4–5)1944: 1 (M5+)19451947: 1 (M4–5)1947: 1 (M5+)1952: 1 (M5+)19541958: 1 (M4–5)1959: 2 (M4–5)1959: 7 (M5+)1963: 1 (M3–4)1963: 6 (M4–5)19631964: 10 (M4–5)1964: 1 (M5+)1965: 6 (M4–5)1965: 1 (M5+)1966: 1 (M4–5)1969: 7 (M4–5)1970: 1 (M4–5)1971: 6 (M4–5)1972: 1 (M3–4)1972: 4 (M4–5)19721973: 1 (M<3)1973: 3 (M3–4)1973: 6 (M4–5)1973: 2 (M5+)1974: 4 (M3–4)1974: 9 (M4–5)1975: 4 (M<3)1975: 18 (M3–4)1975: 14 (M4–5)1975: 3 (M5+)1976: 5 (M<3)1976: 32 (M3–4)1976: 5 (M4–5)1976: 3 (M5+)1977: 2 (M<3)1977: 24 (M3–4)1977: 10 (M4–5)1977: 1 (M5+)1978: 5 (M<3)1978: 23 (M3–4)1978: 4 (M4–5)1979: 13 (M3–4)1979: 3 (M4–5)1980: 1 (M<3)1980: 10 (M3–4)1980: 4 (M4–5)1981: 6 (M<3)1981: 9 (M3–4)1981: 1 (M4–5)19811982: 4 (M<3)1982: 11 (M3–4)1982: 5 (M4–5)1983: 1 (M<3)1983: 46 (M3–4)1983: 18 (M4–5)1983: 5 (M5+)1984: 97 (M<3)1984: 142 (M3–4)1984: 13 (M4–5)1984: 2 (M5+)1985: 1,081 (M<3)1985: 75 (M3–4)1985: 10 (M4–5)1986: 146 (M<3)1986: 24 (M3–4)1986: 2 (M4–5)1987: 78 (M<3)1987: 42 (M3–4)1987: 1 (M4–5)1988: 98 (M<3)1988: 33 (M3–4)1988: 4 (M4–5)1989: 342 (M<3)1989: 24 (M3–4)1989: 1 (M4–5)1990: 596 (M<3)1990: 28 (M3–4)19901991: 267 (M<3)1991: 26 (M3–4)1991: 1 (M4–5)1992: 144 (M<3)1992: 54 (M3–4)1992: 7 (M4–5)1993: 175 (M<3)1993: 26 (M3–4)1993: 3 (M4–5)1994: 753 (M<3)1994: 18 (M3–4)1994: 3 (M4–5)1995: 1,422 (M<3)1995: 36 (M3–4)1995: 5 (M4–5)1996: 1,193 (M<3)1996: 25 (M3–4)1996: 3 (M4–5)1997: 1,342 (M<3)1997: 33 (M3–4)1997: 1 (M4–5)1998: 1,405 (M<3)1998: 17 (M3–4)1998: 6 (M4–5)1999: 3,037 (M<3)1999: 43 (M3–4)1999: 2 (M4–5)19992000: 1,850 (M<3)2000: 29 (M3–4)2000: 7 (M4–5)2001: 1,977 (M<3)2001: 17 (M3–4)2002: 2,166 (M<3)2002: 25 (M3–4)2002: 3 (M4–5)2003: 1,008 (M<3)2003: 11 (M3–4)2004: 1,141 (M<3)2004: 17 (M3–4)2004: 1 (M4–5)2005: 840 (M<3)2005: 53 (M3–4)2005: 2 (M4–5)2005: 1 (M5+)2006: 1,093 (M<3)2006: 18 (M3–4)2006: 4 (M4–5)2007: 910 (M<3)2007: 20 (M3–4)2007: 2 (M4–5)2008: 2,016 (M<3)2008: 23 (M3–4)2008: 1 (M4–5)20082009: 1,559 (M<3)2009: 30 (M3–4)2009: 3 (M4–5)2010: 3,061 (M<3)2010: 30 (M3–4)2010: 1 (M4–5)2011: 675 (M<3)2011: 16 (M3–4)2011: 1 (M4–5)2012: 685 (M<3)2012: 20 (M3–4)2013: 2,604 (M<3)2013: 30 (M3–4)2013: 1 (M4–5)2014: 2,718 (M<3)2014: 73 (M3–4)2014: 4 (M4–5)2015: 2,200 (M<3)2015: 54 (M3–4)2015: 1 (M4–5)2015: 1 (M5+)2016: 2,854 (M<3)2016: 28 (M3–4)2016: 3 (M4–5)2017: 5,700 (M<3)2017: 86 (M3–4)2017: 4 (M4–5)2017: 2 (M5+)20172018: 4,275 (M<3)2018: 35 (M3–4)2018: 1 (M4–5)2019: 3,587 (M<3)2019: 44 (M3–4)2019: 5 (M4–5)2020: 5,515 (M<3)2020: 264 (M3–4)2020: 17 (M4–5)2020: 1 (M5+)2021: 6,122 (M<3)2021: 92 (M3–4)2021: 4 (M4–5)2022: 4,399 (M<3)2022: 55 (M3–4)2022: 2 (M4–5)2023: 3,288 (M<3)2023: 43 (M3–4)2023: 2 (M4–5)2024: 3,477 (M<3)2024: 48 (M3–4)2024: 2 (M4–5)2025: 3,999 (M<3)2025: 77 (M3–4)2025: 4 (M4–5)2025: 1 (M5+)2026: 1,085 (M<3)2026: 10 (M3–4)2026: 2 (M4–5)2026
M<3M3–4M4–5M5+

Read this chart carefully. Rising columns do not mean earthquakes are becoming more frequent. The monitoring network improved over time: the smallest detectable earthquake in Türkiye was about M5.0 in 1966 and is M1.5 today. Earlier years look quiet because small events were not heard, not because they did not happen.

Largest earthquakes

Inclusion rule: the radius widens with magnitude (15 km up to M4, 150 km at M7 and above). This is not a measure of felt shaking or intensity.

MagnitudeDateDepthDistance
7.318.08.1959 06:3710 km238 km
6.928.10.1983 14:0612.5 km408 km
6.928.06.1925 01:2115 km110 km
6.531.03.2020 23:5210.5 km461 km
6.418.08.1959 15:2610 km218 km
6.428.06.1925 02:05131 km
6.223.11.1947 09:4635 km252 km
6.219.10.1935 04:4835 km150 km
6.112.07.1944 19:3035 km482 km
6.031.10.1935 18:3735 km151 km
5.912.10.1935 07:505 km150 km
5.930.06.1975 18:544 km225 km
5.806.07.2017 06:3012.1 km190 km
5.819.08.1959 04:0415 km242 km
5.626.07.2005 04:0811.4 km241 km

Latest earthquakes

MagnitudeDateDepthDistance
0.903.08.2026 17:355.2 km261 km
1.403.08.2026 05:405 km235 km
1.103.08.2026 05:383.6 km236 km
0.903.08.2026 03:556.5 km234 km
1.201.08.2026 22:3710.9 km227 km
0.901.08.2026 22:2811.6 km227 km
0.801.08.2026 22:2411.6 km228 km
1.301.08.2026 19:225.2 km233 km
0.501.08.2026 17:202.5 km234 km
0.501.08.2026 15:577.7 km225 km
1.101.08.2026 10:542.2 km166 km
0.501.08.2026 07:442.2 km224 km
0.331.07.2026 23:093.8 km238 km
0.231.07.2026 10:224.7 km219 km
0.731.07.2026 10:135 km174 km
0.331.07.2026 06:345.7 km241 km
1.031.07.2026 06:217.5 km241 km
1.431.07.2026 06:187.2 km240 km
0.831.07.2026 05:367 km240 km
0.731.07.2026 03:490.5 km203 km
0.331.07.2026 03:374.5 km240 km
0.331.07.2026 03:374.8 km240 km
1.531.07.2026 03:215.4 km240 km
0.631.07.2026 03:145.6 km240 km
0.131.07.2026 03:115.5 km241 km
0.230.07.2026 22:3010.7 km232 km
1.729.07.2026 18:275.8 km150 km
0.629.07.2026 16:086 km224 km
0.829.07.2026 09:026.9 km236 km
0.229.07.2026 08:528.6 km235 km
0.829.07.2026 00:5111.1 km254 km
1.428.07.2026 21:40-2 km223 km
1.828.07.2026 19:02-2 km198 km
-0.128.07.2026 15:269.1 km227 km
-0.128.07.2026 12:385.5 km224 km
1.228.07.2026 07:515.4 km192 km
0.328.07.2026 03:0412.1 km243 km
1.427.07.2026 22:182 km463 km
2.027.07.2026 20:3713.5 km224 km
1.027.07.2026 20:17-2 km237 km
-0.627.07.2026 11:218 km309 km
-0.127.07.2026 04:204.9 km174 km
1.427.07.2026 03:4014.7 km246 km
-0.226.07.2026 16:3014.1 km301 km
0.226.07.2026 09:295 km175 km
0.725.07.2026 19:424.7 km230 km
1.325.07.2026 18:45-2 km237 km
0.125.07.2026 15:539 km234 km
0.325.07.2026 11:494.9 km175 km
0.524.07.2026 16:2820 km118 km
0.724.07.2026 16:175 km244 km
1.624.07.2026 12:008.9 km226 km
-0.224.07.2026 11:162.7 km234 km
0.424.07.2026 06:534.9 km278 km
1.724.07.2026 04:081.4 km173 km
1.323.07.2026 21:557 km224 km
1.923.07.2026 19:247.1 km224 km
1.123.07.2026 13:043 km108 km
1.123.07.2026 10:0411.7 km190 km
0.623.07.2026 04:5713.7 km240 km

Method and sources

What this page counts
An earthquake appears here when its epicentre is within a magnitude-dependent distance of this place's border: 15 km up to M4, 30 km to M5, 60 km to M6, 100 km to M7, and 150 km at M7 and above. The rule exists because a large earthquake concerns neighbouring provinces too — the 17 August 1999 epicentre was in the Gulf of İzmit, on no province's land at all.
Location precision
Epicentre uncertainty is typically 1–10 km, and larger for older records. That is why this site breaks data down to districts but not to neighbourhoods or villages — the data does not support that distinction.
Magnitude scales
The catalogues use more than twelve magnitude scales (Mw, ML, mb, Md…) and they are not equivalent. Values are shown on the scale the source reported; they are not converted.
Deduplication
The same earthquake is published by several catalogues. Records within 20 seconds and 100 km whose magnitudes differ by no more than 1.2 are treated as one event; the primary record is chosen by catalogue priority.
Updates
Recent earthquakes are fetched from four sources every five minutes. The historical archive is rebuilt infrequently.
Sources
USGS ComCat · ISC Bulletin · AFAD · Kandilli / KOERI · EMSC/CSEM
Reporting an error
If you spot a wrong record, write to us; we verify against the source and correct it.