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Reference

Counties with the most earthquakes

Ranked by earthquakes of M2.5+ centred in the county since 1973. Hawaii County, HI, leads with 29,082.

  1. 1Hawaii CountyHI29,082
  2. 2San Bernardino CountyCA11,866
  3. 3Matanuska-Susitna BoroughAK10,431
Counties with the most earthquakes
1Hawaii County HI29,082809M7.7
2San Bernardino County CA11,8661,149M7.3
3Matanuska-Susitna Borough AK10,4311,237M9.2
4Kenai Peninsula Borough AK8,0661,447M9.2
5Mono County CA7,466690M6.5
6Imperial County CA5,853884M7.2
7San Benito County CA5,587563M6.9
8Inyo County CA5,484979M7.1
9Denali Borough AK5,475627M7.9
10Riverside County CA4,325667M7.3
11Yukon-Koyukuk Census Area AK3,134564M7.3
12Sonoma County CA3,107170M7.9
13Fresno County CA2,971956M6.7
14Lake and Peninsula Borough AK2,6361,264M8.2
15Skamania County WA2,630356M6.7
16Kern County CA2,461996M7.5
17Culberson County TX2,30365M6.3
18Los Angeles County CA2,261850M7.5
19North Slope Borough AK2,169241M6.4
20Copper River Census Area AK2,161638M9.2
21Custer County ID2,099119M6.9
22Esmeralda County NV1,989749M6.8
23Aleutians West Census Area AK1,92510,146M8.7
24Santa Clara County CA1,814401M7.9
25Humboldt County CA1,716562M7.2
26Grant County OK1,70772M5.8
27San Luis Obispo County CA1,436479M7.5
28Southeast Fairbanks Census Area AK1,371339M7.9
29San Diego County CA1,336983M6.9
30Washoe County NV1,253221M6.5
31Monterey County CA1,231576M6.9
32Mineral County NV1,205858M7.1
33Kodiak Island Borough AK1,2011,365M7.9
34Yakutat City and Borough AK1,177360M7.1
35Logan County OK1,13976M5.8
36Northwest Arctic Borough AK1,119193M6.8
37Lake County CA1,027142M6.0
38Nye County NV1,008492M7.1
39Aleutians East Borough AK9951,783M8.2
40Mendocino County CA917395M7.2
41Alpine County CA827160M6.1
42Contra Costa County CA817178M7.9
43Chugach Census Area AK785527M9.2
44Garfield County OK77896M5.8
45Oklahoma County OK74959M5.8
46Plumas County CA745133M6.4
47Caribou County ID715111M6.1
48Tulare County CA707554M7.1
49Butte County CA68691M5.9
50Reeves County TX68059M6.3
51Alfalfa County OK67165M5.1
52Woods County OK65843M5.1
53Payne County OK65066M5.8
54Noble County OK64583M5.8
55Teton County WY613144M7.2
56Alameda County CA583294M7.9
57Elko County NV55056M6.0
58Lincoln County OK51860M5.8
59Ventura County CA509587M7.5
60Shasta County CA48395M5.7
61Fairbanks North Star Borough AK480134M7.1
62Park County WY45298M7.2
63Nome Census Area AK43681M6.0
64Santa Cruz County CA430379M7.9
65Lincoln County NV399137M6.3
66Harper County KS38750M5.1
67Pawnee County OK37169M5.8
68Bear Lake County ID361108M6.1
69Kings County CA353246M6.7
70Woodward County OK34823M5.1
71Tehama County CA321134M5.9
72Major County OK31967M5.1
73Hoonah-Angoon Census Area AK316152M7.8
74Trinity County CA305231M7.2
75Lyon County NV284406M7.1
76Sevier County UT27129M6.6
77Las Animas County CO26422M5.3
78Beaverhead County MT261133M7.2
79Anchorage Municipality AK260432M9.2
80Faulkner County AR2587M4.7
81King County WA24769M6.8
82Siskiyou County CA246101M7.2
83Orange County CA239428M6.7
84Emery County UT23820M5.2
85Madera County CA237676M6.7
86Madison County MT231118M7.2
87Martin County TX23111M5.2
88Lewis and Clark County MT22250M6.6
89Sierra County CA217126M6.4
90Iron County UT21660M6.6
91Klamath County OR21628M6.0
92Box Elder County UT21277M6.6
93Gallatin County MT209122M7.2
94Valley County ID20398M6.5
95Napa County CA203157M7.9
96Eddy County NM20159M5.4
97Scurry County TX19719M5.1
98Glenn County CA196149M5.9
99Kingfisher County OK18080M5.8
100Sumner County KS17837M5.8

Figures come from each place’s page and share its sources and rules; see the methodology.

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