Counties with the most strong earthquakes nearby

Ranked by earthquakes of M4+ within 50 miles since 1900. Aleutians West Census Area, AK, leads with 10,146.

Counties with the most strong earthquakes nearby

1	Aleutians West Census Area AK	10,146	2,254	M8.7
2	Aleutians East Borough AK	1,783	326	M8.2
3	Kenai Peninsula Borough AK	1,447	259	M9.2
4	Kodiak Island Borough AK	1,365	358	M7.9
5	Lake and Peninsula Borough AK	1,264	210	M8.2
6	Matanuska-Susitna Borough AK	1,237	199	M9.2
7	San Bernardino County CA	1,149	116	M7.3
8	Kern County CA	996	112	M7.5
9	San Diego County CA	983	102	M6.9
10	Inyo County CA	979	108	M7.1
11	Fresno County CA	956	112	M6.7
12	Imperial County CA	884	97	M7.2
13	Mineral County NV	858	146	M7.1
14	Los Angeles County CA	850	97	M7.5
15	Hawaii County HI	809	86	M7.7
16	Esmeralda County NV	749	111	M6.8
17	Mono County CA	690	88	M6.5
18	Madera County CA	676	77	M6.7
19	Riverside County CA	667	71	M7.3
20	Copper River Census Area AK	638	119	M9.2
21	Denali Borough AK	627	89	M7.9
22	Ventura County CA	587	70	M7.5
23	Monterey County CA	576	74	M6.9
24	Yukon-Koyukuk Census Area AK	564	88	M7.3
25	San Benito County CA	563	73	M6.9
26	Humboldt County CA	562	105	M7.2
27	Tulare County CA	554	57	M7.1
28	Chugach Census Area AK	527	170	M9.2
29	Tuolumne County CA	494	60	M6.4
30	Nye County NV	492	92	M7.1
31	San Luis Obispo County CA	479	65	M7.5
32	Anchorage Municipality AK	432	94	M9.2
33	Orange County CA	428	49	M6.7
34	Lyon County NV	406	92	M7.1
35	Merced County CA	402	49	M6.9
36	Santa Clara County CA	401	52	M7.9
37	Mendocino County CA	395	49	M7.2
38	Pierce County WA	391	30	M6.8
39	Mariposa County CA	381	48	M6.2
40	Santa Cruz County CA	379	49	M7.9
41	Thurston County WA	376	26	M6.8
42	Lewis County WA	372	26	M6.8
43	Stanislaus County CA	364	44	M6.9
44	Santa Barbara County CA	364	60	M7.5
45	Yakutat City and Borough AK	360	85	M7.1
46	Yakima County WA	358	17	M5.7
47	Skamania County WA	356	21	M6.7
48	Yuma County AZ	351	50	M7.2
49	Cowlitz County WA	349	21	M6.7
50	Klickitat County WA	349	18	M5.7
51	Clark County WA	344	19	M5.7
52	Hood River County OR	342	19	M5.7
53	Southeast Fairbanks Census Area AK	339	48	M7.9
54	Multnomah County OR	338	19	M5.7
55	Columbia County OR	337	19	M5.7
56	Washington County OR	326	17	M5.7
57	Wahkiakum County WA	319	16	M5.8
58	Alameda County CA	294	43	M7.9
59	San Mateo County CA	274	42	M7.9
60	Churchill County NV	274	74	M7.1
61	San Joaquin County CA	266	34	M6.9
62	Kings County CA	246	31	M6.7
63	North Slope Borough AK	241	23	M6.4
64	Trinity County CA	231	42	M7.2
65	Douglas County NV	226	48	M6.5
66	Washoe County NV	221	47	M6.5
67	Lander County NV	197	58	M7.1
68	Northwest Arctic Borough AK	193	23	M6.8
69	Bethel Census Area AK	183	36	M6.9
70	Contra Costa County CA	178	26	M7.9
71	Yolo County CA	176	13	M6.0
72	Sonoma County CA	170	13	M7.9
73	Marin County CA	164	14	M7.9
74	Alpine County CA	160	31	M6.1
75	Storey County NV	157	38	M6.5
76	Napa County CA	157	12	M7.9
77	Placer County CA	155	29	M6.4
78	Solano County CA	155	13	M7.9
79	Colusa County CA	153	12	M6.0
80	El Dorado County CA	152	30	M6.4
81	Hoonah-Angoon Census Area AK	152	38	M7.8
82	Glenn County CA	149	10	M5.9
83	Teton County WY	144	23	M7.2
84	Lake County CA	142	10	M6.0
85	San Francisco County CA	141	23	M7.9
86	Lincoln County NV	137	18	M6.3
87	Nevada County CA	137	26	M6.4
88	Fairbanks North Star Borough AK	134	17	M7.1
89	Tehama County CA	134	18	M5.9
90	Carson City NV	133	25	M6.4
91	Beaverhead County MT	133	25	M7.2
92	Plumas County CA	133	25	M6.4
93	Lassen County CA	126	22	M6.4
94	Sierra County CA	126	27	M6.4
95	Lemhi County ID	122	13	M6.9
96	Gallatin County MT	122	31	M7.2
97	Custer County ID	119	12	M6.9
98	Madison County MT	118	29	M7.2
99	La Paz County AZ	115	21	M6.9
100	Lincoln County WY	112	10	M5.8

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

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