M4.3 earthquake 78 km N of Cefalù, Sicily, Italy

A magnitude 4.3 earthquake struck 78 km N of Cefalù, Sicily, Italy at 11:51 local time (09:51 UTC) on 23 Oct 2026, at a depth of 24 km, according to INGV, GFZ and USGS. The solution is preliminary and may be revised.

Reported by 3 agencies · revised from M4.7

Data: INGV, GFZ, USGS · updated 2026-10-23 10:11 UTC · automatic solution

Magnitude: 4.3light
local magnitude (Richter) (ML)
revised from 4.7
Depth: 24 km
Status: Automatic
Origin time: 2026-10-23 09:51:38 UTC; Local: 23 Oct 2026, 11:51:38 (Europe/Rome)
Epicentre: 38.728° N, 14.172° 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	78 km	IIWeak
Capo d'OrlandoSicily, Italy · pop. 12,038	81 km	IIWeak
BagheriaSicily, Italy · pop. 53,149	92 km	IIWeak
Termini ImereseSicily, Italy · pop. 22,957	93 km	IIWeak
PalermoSicily, Italy · pop. 648,260	98 km	IIWeak
MonrealeSicily, Italy · pop. 21,964	105 km	IIWeak
CataniaSicily, Italy · pop. 311,584	158 km	INot felt
NaplesCampania, Italy · pop. 909,048	236 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 55 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
GFZGFZ via GEOFON, GFZ Helmholtz Centre for Geosciences	5.0 Mwwas 4.6	27.2 km	38.71° N, 14.22° E	+3.9 s	Automatic · 2 revisions
INGVheadlineINGV via Istituto Nazionale di Geofisica e Vulcanologia	4.3 ML	24 km	38.73° N, 14.17° E	–	Automatic
USGSUSGS NEIC via U.S. Geological Survey	4.9 mb	10 km	38.72° N, 14.25° E	+0.8 s	Reviewed

How big was it?

Widely felt near the epicentre: rattling windows and objects. Significant damage is unlikely.

It released roughly the energy of 43 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 24 km this was a shallow earthquake, which is felt more strongly at the surface than a deeper one of the same size.

Compare M4.3 with M3.3

M4.3 releases about 32× the energy of M3.3, and its waves are about 10× taller on a seismogram. Energy: 43 t of TNT vs 1.3 t of TNT.

Each square is the energy of one M3.3. Energy from log₁₀E = 1.5M + 4.8.

Aftershocks and nearby activity

366 later earthquakes within 30 km; the largest was M5.0 20 days ago. 16 in the 7 days before. Aftershock rates usually fall off roughly in proportion to 1/time.

Aftershocks

Mainshock M4.3

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

Aftershocks
Time after mainshock (hours)	Magnitude	Depth (km)
0.08	3.6	32
0.22	2.9	10
0.46	5.0	9
0.56	4.0	8
0.69	3.3	11
0.84	3.0	10
0.86	3.2	10
1.00	3.2	25
1.06	2.8	10
1.07	3.3	10
1.28	2.9	10
1.28	2.9	10
1.46	2.7	10
1.57	2.9	8
1.90	2.8	10
2.07	2.7	8
2.23	3.2	8
2.37	2.9	9
2.37	2.9	9
2.55	2.5	10
2.58	3.0	10
2.58	3.0	10
2.65	2.8	10
2.65	2.8	10
2.73	2.9	10
2.76	2.6	17
2.84	2.7	10
2.94	2.7	10
3.14	3.2	10
3.23	2.5	10
3.36	3.0	10
3.36	3.0	10
3.50	2.8	10
3.56	2.5	6
3.61	2.2	10
3.90	2.1	10
3.95	2.4	10
4.07	4.6	8
4.07	4.6	8
4.23	2.9	13
4.23	2.9	13
4.34	2.8	10
4.34	2.8	10
4.57	2.7	10
4.60	2.1	11
4.62	2.3	9
4.75	2.7	10
4.79	2.9	6
5.01	2.5	10
5.23	3.5	6
5.37	3.0	7
5.37	3.0	7
5.58	2.4	10
5.68	4.1	7
5.73	2.9	7
5.92	2.4	10
6.04	2.1	10
6.38	2.7	10
6.38	2.7	10
6.43	2.6	10
6.43	2.6	10
6.47	2.1	10
6.49	1.9	10
6.90	2.5	10
6.99	2.7	6
7.01	2.4	7
7.11	3.1	10
7.30	2.8	10
7.30	2.8	10
7.32	2.6	10
7.32	2.6	10
7.42	2.6	10
7.42	2.6	10
7.64	2.2	9
8.01	2.5	10
8.24	2.2	10
8.47	2.3	10
8.47	2.3	10
9.01	2.2	10
9.25	2.5	10
9.32	2.9	4
9.32	2.9	4
9.47	2.8	10
9.64	3.1	6
9.76	2.2	12
9.93	2.7	10
10.18	2.7	10
10.48	2.8	10
10.48	2.8	10
10.64	2.6	12
10.80	2.5	10
10.94	2.5	10
10.96	2.3	28
10.98	2.3	10
11.63	2.1	10
11.76	1.9	10
12.12	2.1	10
12.33	2.1	7
12.33	2.1	7
12.48	3.1	10
12.73	2.7	10
12.90	2.5	9
12.93	2.4	10
12.98	2.9	10
13.15	2.1	10
13.28	2.1	10
13.49	2.6	10
13.53	2.5	27
13.83	1.8	10
13.88	2.5	10
13.91	2.3	10
14.00	1.8	10
14.07	2.7	30
14.17	2.1	10
14.21	2.3	10
14.27	2.4	10
14.53	2.4	10
15.00	2.2	10
15.06	1.8	10
15.49	2.2	10
15.65	1.8	10
15.86	2.0	10
15.92	2.3	10
15.95	2.7	10
16.05	1.7	10
16.10	2.6	10
16.61	3.3	10
16.70	2.2	10
16.85	2.0	10
17.36	3.4	10
17.36	3.4	10
17.58	2.5	10
17.72	2.5	10
17.80	2.2	10
18.29	2.2	10
18.38	2.3	10
18.86	2.0	10
19.35	3.1	10
19.35	3.1	10
19.86	2.6	10
20.09	2.1	10
20.58	2.9	10
20.86	2.5	10
20.90	2.9	10
21.01	2.1	9
21.03	2.5	10
21.18	2.5	10
21.41	2.2	10
21.41	2.2	10
21.67	2.3	10
21.86	2.1	8
21.94	2.3	10
22.28	2.5	10
22.32	2.3	12
22.32	2.3	12
22.46	2.3	10
23.20	2.7	10
23.61	3.5	12
24.42	2.4	12
24.42	2.4	12
24.53	2.2	10
24.53	2.2	10
24.82	2.1	10
24.82	2.1	10
26.66	2.1	10
26.75	2.2	10
27.56	2.1	9
28.80	2.0	10
29.09	2.0	9
31.48	2.2	10
31.55	2.3	10
32.04	2.5	10
33.59	2.1	10
34.36	2.3	10
34.36	2.3	10
34.44	2.3	10
34.77	2.8	10
35.77	2.7	10
36.97	2.6	9
39.85	2.2	10
40.56	2.5	10
43.27	2.6	10
43.73	2.4	10
46.76	2.3	10
47.47	2.4	10
48.95	2.4	8
49.88	2.9	11
49.97	3.4	19
50.02	2.7	31
50.99	2.4	10
52.54	2.8	10
54.37	2.1	10
54.37	2.1	10
54.63	1.9	10
55.44	2.6	10
55.44	2.6	10
58.75	2.4	10
59.12	2.8	35
59.82	2.2	30
60.03	2.3	23
60.80	2.9	9
62.88	2.2	34
63.17	2.6	32
63.17	2.4	7
64.06	2.6	11
64.67	2.0	10
65.26	2.2	10
68.51	2.0	26
68.51	2.0	26
72.15	3.2	10
74.07	2.3	10
74.07	2.3	10
76.49	3.2	10
76.49	3.2	10
77.02	2.7	10
77.02	2.7	10
77.24	2.0	10
77.24	2.0	10
81.48	2.0	10
82.24	2.6	10
83.73	1.8	10
84.65	2.1	9
86.26	1.8	10
87.73	1.7	10
88.59	2.5	11
88.65	2.2	10
88.78	1.9	10
90.14	1.7	10
93.47	2.4	10
93.47	2.4	10
96.52	1.9	10
98.42	2.7	10
99.28	2.0	10
102.70	2.3	10
104.63	2.5	10
108.30	3.0	9
110.16	2.5	9
110.38	2.3	9
111.91	2.5	10
112.63	3.4	10
113.48	2.0	10
113.48	2.0	10
116.53	3.3	10
117.01	2.5	10
118.59	2.3	11
118.59	2.3	11
120.20	2.6	9
120.30	2.6	8
120.30	2.6	8
120.37	2.4	10
120.37	2.4	10
121.24	2.8	9
121.24	2.8	9
122.85	2.3	8
125.28	2.4	10
129.10	1.7	10
137.77	2.1	10
141.29	1.8	10
142.83	3.1	10
143.89	2.0	10
148.00	2.4	10
157.41	1.9	10
158.44	2.1	10
160.43	2.4	10
160.69	1.6	10
161.68	2.4	10
161.68	2.4	10
161.75	2.7	10
161.75	2.7	10
163.72	3.6	10
164.01	2.2	10
164.39	3.0	10
165.33	1.8	28
165.33	1.8	28
166.18	1.7	10
170.82	1.9	8
170.82	1.9	8
171.96	2.0	11
177.02	1.6	10
178.22	1.5	9
183.68	2.0	10
187.60	1.9	10
189.27	2.9	10
190.85	1.9	9
190.85	1.9	9
192.29	1.8	10
193.20	1.8	10
193.20	1.8	10
196.73	2.4	7
196.73	2.4	7
199.38	2.3	9
199.59	2.5	10
200.27	1.8	10
200.31	2.3	11
203.54	1.8	10
205.62	1.9	10
207.02	2.2	10
208.65	2.3	9
211.69	1.8	10
213.01	2.3	10
213.01	2.3	10
224.59	2.3	10
229.95	2.7	8
229.95	2.7	8
251.63	2.4	10
252.95	2.5	10
258.25	2.2	10
258.25	2.2	10
272.08	2.3	10
272.08	2.3	10
274.80	2.0	10
274.80	2.0	10
295.11	1.7	27
296.17	1.6	7
296.17	1.6	7
299.46	2.2	10
299.46	2.2	10
300.33	1.6	10
300.33	1.6	10
301.67	2.1	10
301.67	2.1	10
349.91	1.8	22
353.30	2.0	3
358.45	1.9	28
359.09	2.4	28
366.54	2.5	29
367.48	1.7	29
375.49	2.0	9
380.37	2.0	9
382.00	2.0	10
388.80	2.2	29
397.65	2.9	10
397.79	2.3	12
398.13	2.3	14
398.19	2.3	30
400.45	1.9	10
402.17	2.4	9
402.86	2.1	10
415.80	2.0	9
435.92	2.0	25
451.34	4.1	8
451.67	2.2	10
451.83	2.6	10
451.99	2.2	10
452.25	2.1	10
452.27	2.2	10
453.35	2.3	34
455.57	2.1	10
457.17	3.3	33
457.37	2.9	10
457.44	2.5	17
457.82	2.2	7
459.30	2.8	6
459.72	2.9	10
460.08	2.2	9
462.50	1.8	9
462.67	2.2	10
462.89	1.9	6
464.57	2.0	10
469.05	2.0	10
469.10	2.3	7
469.16	1.9	28
478.48	2.9	8
485.73	3.0	10
486.26	3.0	7
487.62	2.1	10

Did you feel it?

Reports from people help show where shaking was strong. They are anonymous and shown here in aggregate.

Reports close 14 days after an earthquake.

Reports on SeismoAtlas

No reports yet.

Event id gfz2026utsx. First recorded here 23 Oct 2026, 09:55:22 UTC. Solutions: GFZ (geofon:gfz2026utsx); INGV (ingv:47605832); USGS (usgs:us6000u4bg). Cite as: SeismoAtlas, “M4.3 earthquake 78 km N of Cefalù, Sicily, Italy”, https://seismoatlas.com/earthquake/gfz2026utsx-m4-3-earthquake-78-km-n-of-cefalu-sicily-italy, data from INGV, GFZ, USGS.

JSON: /api/v1/events/gfz2026utsx. SeismoAtlas is not an official warning service.