M3.9 earthquake 81 km N of Cefalù, Sicily, Italy

A magnitude 3.9 earthquake struck 81 km N of Cefalù, Sicily, Italy at 10:02 local time (08:02 UTC) on 23 Oct 2026, at a depth of 25 km, according to INGV and USGS. The solution is preliminary and may be revised.

Reported by 2 agencies

Data: INGV, USGS · updated 2026-10-31 06:56 UTC · automatic solution

Magnitude: 3.9minor
local magnitude (Richter) (ML)
Depth: 24.9 km
Status: Automatic
Origin time: 2026-10-23 08:02:21 UTC; Local: 23 Oct 2026, 10:02:21 (Europe/Rome)
Epicentre: 38.764° N, 14.132° E

Circles show this event and others within 30 km from 7 days before to 30 days after. Lines: plate boundaries and GEM active faults. Open on the live map

Nearby places

Distance and estimated shaking at nearby places
Place	Distance	Est. shaking
CefalùSicily, Italy · pop. 11,613	81 km	INot felt
Capo d'OrlandoSicily, Italy · pop. 12,038	87 km	INot felt
BagheriaSicily, Italy · pop. 53,149	93 km	INot felt
Termini ImereseSicily, Italy · pop. 22,957	95 km	INot felt
PalermoSicily, Italy · pop. 648,260	98 km	INot felt
MonrealeSicily, Italy · pop. 21,964	106 km	INot felt
CataniaSicily, Italy · pop. 311,584	164 km	INot felt
NaplesCampania, Italy · pop. 909,048	232 km	INot felt

Shaking is an estimate from the intensity prediction equation of Allen, Wald & Worden (2012), not an observation. Local ground and buildings can change it by a level or more. Likely felt out to about 31 km.

Every agency's solution

Agencies locate earthquakes with their own stations and methods, so their numbers differ. We match reports of the same event by time, distance and magnitude and show them side by side. The headline uses INGV.

Agency	Magnitude	Depth	Epicentre	Time offset	Status
INGVheadlineINGV via Istituto Nazionale di Geofisica e Vulcanologia	3.9 ML	24.9 km	38.76° N, 14.13° E	–	Automatic
USGSUSGS NEIC via U.S. Geological Survey	4.2 mb	10 km	38.86° N, 14.23° E	+2.3 s	Reviewed

How big was it?

Often felt by people at rest close to the epicentre, rarely causes damage.

It released roughly the energy of 11 t of TNT. Magnitude is logarithmic: each whole step means about 32 times more energy and 10 times larger waves on a seismogram. Depth matters too: at 25 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

Compare M3.9 with M2.9

M3.9 releases about 32× the energy of M2.9, and its waves are about 10× taller on a seismogram. Energy: 11 t of TNT vs 338 kg of TNT.

Each square is the energy of one M2.9. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

367 later earthquakes within 30 km; the largest was M5.0 20 days ago. 14 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M3.9

367 later earthquakes nearby. Aftershock rates typically fall off roughly as 1/time (Omori's law).

Aftershocks
Time after mainshock (hours)	Magnitude	Depth (km)
1.04	3.3	9
1.82	4.3	24
1.90	3.6	32
2.04	2.9	10
2.28	5.0	9
2.38	4.0	8
2.52	3.3	11
2.66	3.0	10
2.68	3.2	10
2.82	3.2	25
2.88	2.8	10
2.89	3.3	10
3.10	2.9	10
3.10	2.9	10
3.28	2.7	10
3.39	2.9	8
3.72	2.8	10
3.90	2.7	8
4.06	3.2	8
4.19	2.9	9
4.19	2.9	9
4.37	2.5	10
4.40	3.0	10
4.40	3.0	10
4.47	2.8	10
4.47	2.8	10
4.55	2.9	10
4.58	2.6	17
4.66	2.7	10
4.76	2.7	10
4.96	3.2	10
5.05	2.5	10
5.18	3.0	10
5.18	3.0	10
5.32	2.8	10
5.38	2.5	6
5.44	2.2	10
5.72	2.1	10
5.77	2.4	10
5.89	4.6	8
5.89	4.6	8
6.05	2.9	13
6.05	2.9	13
6.16	2.8	10
6.16	2.8	10
6.39	2.7	10
6.43	2.1	11
6.45	2.3	9
6.57	2.7	10
6.61	2.9	6
6.83	2.5	10
7.05	3.5	6
7.19	3.0	7
7.19	3.0	7
7.40	2.4	10
7.50	4.1	7
7.56	2.9	7
7.74	2.4	10
7.86	2.1	10
8.20	2.7	10
8.20	2.7	10
8.25	2.6	10
8.25	2.6	10
8.29	2.1	10
8.32	1.9	10
8.72	2.5	10
8.81	2.7	6
8.84	2.4	7
8.94	3.1	10
9.12	2.8	10
9.12	2.8	10
9.14	2.6	10
9.14	2.6	10
9.24	2.6	10
9.24	2.6	10
9.46	2.2	9
9.83	2.5	10
10.06	2.2	10
10.29	2.3	10
10.29	2.3	10
10.84	2.2	10
11.07	2.5	10
11.14	2.9	4
11.14	2.9	4
11.29	2.8	10
11.46	3.1	6
11.58	2.2	12
11.75	2.7	10
12.00	2.7	10
12.30	2.8	10
12.30	2.8	10
12.46	2.6	12
12.63	2.5	10
12.76	2.5	10
12.78	2.3	28
12.81	2.3	10
13.45	2.1	10
13.58	1.9	10
13.94	2.1	10
14.16	2.1	7
14.16	2.1	7
14.30	3.1	10
14.55	2.7	10
14.72	2.5	9
14.75	2.4	10
14.80	2.9	10
14.98	2.1	10
15.11	2.1	10
15.31	2.6	10
15.35	2.5	27
15.65	1.8	10
15.70	2.5	10
15.73	2.3	10
15.82	1.8	10
15.90	2.7	30
15.99	2.1	10
16.04	2.3	10
16.09	2.4	10
16.35	2.4	10
16.83	2.2	10
16.88	1.8	10
17.31	2.2	10
17.47	1.8	10
17.68	2.0	10
17.74	2.3	10
17.77	2.7	10
17.92	2.6	10
18.43	3.3	10
18.52	2.2	10
18.68	2.0	10
19.18	3.4	10
19.18	3.4	10
19.41	2.5	10
19.54	2.5	10
19.62	2.2	10
20.11	2.2	10
20.20	2.3	10
20.68	2.0	10
21.17	3.1	10
21.17	3.1	10
21.68	2.6	10
21.91	2.1	10
22.40	2.9	10
22.68	2.5	10
22.72	2.9	10
22.83	2.1	9
22.85	2.5	10
23.00	2.5	10
23.23	2.2	10
23.23	2.2	10
23.49	2.3	10
23.68	2.1	8
23.76	2.3	10
24.10	2.5	10
24.14	2.3	12
24.14	2.3	12
24.29	2.3	10
25.03	2.7	10
25.44	3.5	12
26.25	2.4	12
26.25	2.4	12
26.35	2.2	10
26.35	2.2	10
26.64	2.1	10
26.64	2.1	10
28.48	2.1	10
28.58	2.2	10
29.38	2.1	9
30.62	2.0	10
30.91	2.0	9
33.30	2.2	10
33.38	2.3	10
33.86	2.5	10
35.41	2.1	10
36.18	2.3	10
36.18	2.3	10
36.26	2.3	10
36.59	2.8	10
37.59	2.7	10
38.79	2.6	9
41.67	2.2	10
42.38	2.5	10
45.09	2.6	10
45.55	2.4	10
48.58	2.3	10
49.29	2.4	10
50.78	2.4	8
51.70	2.9	11
51.79	3.4	19
51.84	2.7	31
52.81	2.4	10
54.36	2.8	10
56.20	2.1	10
56.20	2.1	10
56.45	1.9	10
57.26	2.6	10
57.26	2.6	10
60.57	2.4	10
60.94	2.8	35
61.64	2.2	30
61.85	2.3	23
62.63	2.9	9
64.70	2.2	34
64.99	2.6	32
64.99	2.4	7
65.88	2.6	11
66.49	2.0	10
67.08	2.2	10
70.33	2.0	26
70.33	2.0	26
73.98	3.2	10
75.89	2.3	10
75.89	2.3	10
78.32	3.2	10
78.32	3.2	10
78.84	2.7	10
78.84	2.7	10
79.06	2.0	10
79.06	2.0	10
83.30	2.0	10
84.06	2.6	10
85.55	1.8	10
86.48	2.1	9
88.08	1.8	10
89.56	1.7	10
90.41	2.5	11
90.47	2.2	10
90.60	1.9	10
91.96	1.7	10
95.29	2.4	10
95.29	2.4	10
98.34	1.9	10
100.24	2.7	10
101.10	2.0	10
104.52	2.3	10
106.45	2.5	10
110.12	3.0	9
111.98	2.5	9
112.21	2.3	9
113.73	2.5	10
114.45	3.4	10
115.30	2.0	10
115.30	2.0	10
118.35	3.3	10
118.83	2.5	10
120.42	2.3	11
120.42	2.3	11
122.02	2.6	9
122.12	2.6	8
122.12	2.6	8
122.20	2.4	10
122.20	2.4	10
123.06	2.8	9
123.06	2.8	9
124.67	2.3	8
127.10	2.4	10
130.93	1.7	10
139.59	2.1	10
143.11	1.8	10
144.66	3.1	10
145.71	2.0	10
149.82	2.4	10
159.23	1.9	10
160.26	2.1	10
162.25	2.4	10
162.51	1.6	10
163.50	2.4	10
163.50	2.4	10
163.57	2.7	10
163.57	2.7	10
165.54	3.6	10
165.84	2.2	10
166.21	3.0	10
167.15	1.8	28
167.15	1.8	28
168.00	1.7	10
172.64	1.9	8
172.64	1.9	8
173.79	2.0	11
178.84	1.6	10
180.04	1.5	9
185.50	2.0	10
189.42	1.9	10
191.10	2.9	10
192.67	1.9	9
192.67	1.9	9
194.11	1.8	10
195.02	1.8	10
195.02	1.8	10
198.55	2.4	7
198.55	2.4	7
201.20	2.3	9
201.41	2.5	10
202.09	1.8	10
202.13	2.3	11
205.36	1.8	10
207.44	1.9	10
208.85	2.2	10
210.47	2.3	9
213.51	1.8	10
214.83	2.3	10
214.83	2.3	10
226.41	2.3	10
231.77	2.7	8
231.77	2.7	8
253.45	2.4	10
254.77	2.5	10
260.07	2.2	10
260.07	2.2	10
273.90	2.3	10
273.90	2.3	10
276.62	2.0	10
276.62	2.0	10
296.93	1.7	27
297.99	1.6	7
297.99	1.6	7
301.29	2.2	10
301.29	2.2	10
302.15	1.6	10
302.15	1.6	10
303.49	2.1	10
303.49	2.1	10
351.73	1.8	22
355.12	2.0	3
360.27	1.9	28
360.91	2.4	28
368.36	2.5	29
369.30	1.7	29
377.31	2.0	9
382.20	2.0	9
383.82	2.0	10
390.62	2.2	29
399.47	2.9	10
399.61	2.3	12
399.96	2.3	14
400.01	2.3	30
402.27	1.9	10
403.99	2.4	9
404.68	2.1	10
417.62	2.0	9
437.74	2.0	25
453.16	4.1	8
453.49	2.2	10
453.66	2.6	10
453.81	2.2	10
454.08	2.1	10
454.09	2.2	10
455.18	2.3	34
457.39	2.1	10
458.99	3.3	33
459.19	2.9	10
459.26	2.5	17
459.64	2.2	7
461.12	2.8	6
461.55	2.9	10
461.90	2.2	9
464.32	1.8	9
464.49	2.2	10
464.71	1.9	6
466.39	2.0	10
470.88	2.0	10
470.92	2.3	7
470.98	1.9	28
480.30	2.9	8
487.56	3.0	10
488.08	3.0	7
489.44	2.1	10

Did you feel it?

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Reports on SeismoAtlas

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Event id ingv47604822. First recorded here 23 Oct 2026, 08:17:09 UTC. Solutions: INGV (ingv:47604822); USGS (usgs:us7000tu9t). Cite as: SeismoAtlas, “M3.9 earthquake 81 km N of Cefalù, Sicily, Italy”, https://seismoatlas.com/earthquake/ingv47604822-m3-9-earthquake-81-km-n-of-cefalu-sicily-italy, data from INGV, USGS.

JSON: /api/v1/events/ingv47604822. SeismoAtlas is not an official warning service.