RSNI - Manually revised location

MANUAL Location - Area: Alpi Cozie , magnitude (M_L): 0.8
2026-09-18 09:44:49 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2026-09-18 18:10:30

Earthquake info - Manual location

Event - ID :	260918094358
Magnitude (M_L) :	0.8 +/- 0.2
Origin Time :	2026-09-18 09:44:49.577 (UTC)
Location :	Latitude: 44.548 N, Longitude: 6.946 E
Area :	Alpi Cozie
Depth (km) :	8.02
Distances (km) :	6.7 --- Bellino 8.7 --- Acceglio 10.5 --- Pontechianale 10.8 --- Casteldelfino 11.2 --- Prazzo 11.4 --- Elva 14.8 --- Canosio 15.0 --- Stroppo 15.3 --- Marmora 16.8 --- Argentera 19.1 --- Macra 19.6 --- Sampeyre 19.8 --- Celle di Macra 23.7 --- Pietraporzio 23.8 --- Crissolo 24.1 --- Oncino 25.1 --- Ostana 25.3 --- San Damiano Macra 25.4 --- Sambuco 26.1 --- Castelmagno

Quality location estimate: Erh: 1.1 km, Erz: 1.4 km, Nf: 28, Gap: 140 °, Rms: 0.31

Manual location results

Station	Net	P arrival time	P pick err	P pick weight	P res	Nll weight	S arrival time	S pick err	S pick weight	S res	Nll weight	Dist.
PONC	IV	2026-09-18 09:44:52.857	0.020	0	0.33	0.70	2026-09-18 09:44:54.645	0.040	0	-0.03	1.33	14.5
PZZ	GU	2026-09-18 09:44:53.200	0.009	0	-0.00	1.38	2026-09-18 09:44:55.324	0.049	1	-0.52	1.02	17.1
VIND	IV	2026-09-18 09:44:55.501	0.020	0	-0.49	1.10	2026-09-18 09:44:59.890	0.040	0	-0.61	0.71	33.1
BHB	GU	2026-09-18 09:44:57.530	0.147	6	0.24	1.03	2026-09-18 09:45:02.409	0.249	6	-0.27	1.09	41.4
ISO	FR	2026-09-18 09:44:57.668	0.020	0	0.21	1.12	2026-09-18 09:45:02.840	0.127	3	-0.02	1.25	42.3
OGAG	FR	2026-09-18 09:44:57.077	0.020	0	-0.52	1.03	2026-09-18 09:45:03.124	0.129	3	-0.19	1.14	42.8
RRL	GU	2026-09-18 09:44:57.620	0.022	1	-0.40	1.08	2026-09-18 09:45:03.740	0.128	3	-0.27	1.10	44.4
STV	GU	2026-09-18 09:44:57.558	0.020	0	-0.32	0.93	2026-09-18 09:45:03.680	0.138	4	0.02	1.24	46.1
ENR	GU	2026-09-18 09:44:58.970	0.027	1	0.08	1.36	2026-09-18 09:45:05.442	0.204	6	0.06	1.15	52.4
RSP	GU	2026-09-18 09:45:02.571	0.020	0	0.09	1.32	2026-09-18 09:45:11.345	0.040	0	-0.19	1.15	71.9
TURF	FR	2026-09-18 09:45:03.128	0.020	0	0.18	1.19	2026-09-18 09:45:12.003	0.040	0	-0.39	1.02	73.4
GBOS	GU	2026-09-18 09:45:03.601	0.020	0	0.22	1.10	2026-09-18 09:45:13.229	0.237	6	0.28	0.83	79.2
LSD	GU	2026-09-18 09:45:08.588	0.020	0	1.01	0.01	2026-09-18 09:45:19.420	0.485	9	-0.73	0.57	102.9
IMI	GU	2026-09-18 09:45:06.601	0.020	0	-0.92	0.16	2026-09-18 09:45:19.930	0.398	8	-0.25	0.89	103.9

Local magnitude (M_L) calculation results

Station	Net	Channels	Stat. Mag.	Wood-And. Ampl.	Dist. (km)	Azimuth
PONC	IV	HH	0.27	8.77e-2	14.5	35
PZZ	GU	HH	0.80	3.79e-1	17.1	109
BHB	GU	HH	0.55	2.13e-2	41.4	38
OGAG	FR	HH	0.94	5.42e-2	42.8	310
RRL	GU	HH	0.79	2.40e-2	44.4	343
STV	GU	HH	0.84	2.54e-2	46.1	138
ENR	GU	HH	1.15	8.12e-2	52.4	133
RSP	GU	HH	0.65	1.02e-2	71.9	21
TURF	FR	HH	1.01	2.09e-2	73.4	151
LSD	GU	HH	0.89	7.22e-3	102.9	8

Results of PGA, PGV, IH, spectral amplitudes (SA) values calculation

Station

Net

Channel

PGA
(g)

PGV
(m/s)

IH 0*
(m)

IH 1*
(m)

IH 2*
(m)

Sa(T=0.10)
(g)

Sa(T=0.30)
(g)

Sa(T=1.00)
(g)

Sa(T=3.00)
(g)

Dist.
(km)

Azim.
(°)

PONC

HHZ

4.6012e-5

2.9370e-6

7.0763e-7

2.1185e-7

1.3296e-7

4.5114e-5

3.0897e-6

2.4941e-7

5.7559e-8

14.5

PONC

HHN

2.1344e-5

2.3079e-6

3.7750e-7

1.1448e-7

6.3204e-8

1.5324e-5

1.8369e-6

1.4984e-7

3.8548e-8

14.5

PONC

HHE

2.4005e-5

2.1762e-6

5.5943e-7

1.9816e-7

1.1353e-7

3.1193e-5

2.4006e-6

2.1673e-7

4.8062e-8

14.5

PZZ

HHZ

4.9784e-5

7.8042e-6

2.5356e-6

7.4089e-7

4.5479e-7

1.3708e-4

8.5168e-6

8.4715e-7

1.7367e-7

17.1

109

PZZ

HHN

5.5369e-5

8.1274e-6

2.9164e-6

7.0653e-7

3.9278e-7

2.0825e-4

9.5058e-6

6.8137e-7

1.7317e-7

17.1

109

PZZ

HHE

6.3690e-5

9.5883e-6

3.0162e-6

8.6301e-7

5.2179e-7

1.2019e-4

1.3742e-5

8.9296e-7

2.0830e-7

17.1

109

BHB

HHZ

4.4032e-6

4.5801e-7

2.0248e-7

7.1059e-8

3.6431e-8

1.1818e-5

6.8290e-7

6.6985e-8

9.4550e-9

41.4

BHB

HHN

3.2144e-6

4.1066e-7

1.7638e-7

4.4635e-8

2.7555e-8

6.1896e-6

6.9549e-7

5.0479e-8

9.2542e-9

41.4

BHB

HHE

3.4478e-6

3.8448e-7

1.7311e-7

5.0295e-8

2.7277e-8

8.2315e-6

5.2840e-7

4.9515e-8

9.0993e-9

41.4

ISO

HHZ

2.6805e-6

3.4132e-7

1.3151e-7

3.8141e-8

1.7407e-8

4.9733e-6

3.4512e-7

2.9760e-8

6.2519e-9

42.3

168

ISO

HHN

3.7868e-6

3.7259e-7

1.0521e-7

2.8398e-8

1.5824e-8

4.6628e-6

4.1489e-7

2.9409e-8

7.3160e-9

42.3

168

ISO

HHE

2.5101e-6

2.8547e-7

1.2121e-7

2.8251e-8

1.5884e-8

6.0308e-6

6.0153e-7

2.5083e-8

5.4401e-9

42.3

168

OGAG

HHZ

1.5087e-6

3.2824e-7

2.5730e-7

1.0899e-7

5.1135e-8

4.2464e-6

1.4110e-6

6.4505e-8

7.8715e-9

42.8

310

OGAG

HHN

2.2597e-6

5.8104e-7

3.2824e-7

8.8836e-8

4.4579e-8

5.2495e-6

1.3655e-6

6.6277e-8

1.3698e-8

42.8

310

OGAG

HHE

2.5258e-6

5.0034e-7

4.0627e-7

1.7178e-7

8.1482e-8

3.4183e-6

2.2158e-6

1.1909e-7

1.6294e-8

42.8

310

RRL

HHZ

1.8163e-6

2.1502e-7

1.0400e-7

3.8733e-8

2.0495e-8

3.3317e-6

5.2626e-7

3.3618e-8

5.4732e-9

44.4

343

RRL

HHN

2.0906e-6

3.6883e-7

2.4084e-7

6.0062e-8

2.7465e-8

6.6340e-6

1.3217e-6

4.9391e-8

8.4633e-9

44.4

343

RRL

HHE

1.5941e-6

2.7970e-7

1.8016e-7

5.5909e-8

2.4546e-8

4.1371e-6

8.2067e-7

3.6357e-8

5.7763e-9

44.4

343

STV

HHZ

3.4752e-6

4.8083e-7

2.9861e-7

8.5746e-8

3.9714e-8

8.8311e-6

1.6420e-6

5.3435e-8

9.1184e-9

46.1

138

STV

HHN

4.2194e-6

3.9792e-7

2.1135e-7

8.7917e-8

4.2488e-8

7.4942e-6

9.1040e-7

6.6070e-8

1.0714e-8

46.1

138

STV

HHE

5.3743e-6

5.2965e-7

1.9051e-7

6.8298e-8

3.2475e-8

8.5611e-6

9.5241e-7

6.2158e-8

1.1723e-8

46.1

138

ENR

HHZ

9.3093e-6

1.0405e-6

3.7362e-7

1.5953e-7

6.4245e-8

2.2294e-5

1.4373e-6

1.3282e-7

2.2517e-8

52.4

133

ENR

HHN

2.2233e-5

2.3090e-6

5.5627e-7

1.7110e-7

1.0439e-7

3.4100e-5

2.2570e-6

2.1046e-7

5.1023e-8

52.4

133

ENR

HHE

2.3243e-5

1.9249e-6

6.2760e-7

1.5882e-7

8.3980e-8

3.2999e-5

1.9269e-6

1.6292e-7

4.0028e-8

52.4

133

RSP

HHZ

1.0678e-6

1.2685e-7

6.4534e-8

2.3977e-8

1.0947e-8

1.8326e-6

2.9304e-7

1.6186e-8

3.6313e-9

71.9

RSP

HHN

1.1991e-6

1.6170e-7

9.9321e-8

3.1384e-8

1.3868e-8

3.2083e-6

2.9613e-7

2.1036e-8

4.0415e-9

71.9

RSP

HHE

1.3692e-6

1.7497e-7

9.9208e-8

3.1428e-8

1.3276e-8

3.5886e-6

4.4642e-7

2.1165e-8

4.3141e-9

71.9

TURF

HHZ

7.8475e-7

1.5292e-7

9.6069e-8

3.7917e-8

2.5098e-8

3.4725e-6

2.9859e-7

4.3435e-8

3.7117e-9

73.4

151

TURF

HHN

1.0926e-6

1.8429e-7

9.7588e-8

2.5632e-8

2.0969e-8

4.6876e-6

3.0615e-7

3.3960e-8

4.2449e-9

73.4

151

TURF

HHE

8.3151e-7

1.6778e-7

1.0687e-7

6.5636e-8

8.4810e-8

2.8262e-6

3.4374e-7

1.4244e-7

1.8633e-8

73.4

151

GBOS

HHZ

2.9721e-6

5.8743e-7

3.5960e-7

1.0961e-7

5.7695e-8

9.9951e-6

1.4681e-6

8.4545e-8

1.5621e-8

79.2

115

GBOS

HHN

1.9879e-6

5.0993e-7

3.4007e-7

1.0355e-7

5.2998e-8

8.7536e-6

2.4921e-6

7.7802e-8

1.1446e-8

79.2

115

GBOS

HHE

3.4185e-6

8.3055e-7

5.5716e-7

1.5979e-7

8.5843e-8

1.0300e-5

3.0393e-6

1.3030e-7

1.9532e-8

79.2

115

LSD

HHZ

5.1694e-7

7.1295e-8

4.1984e-8

1.5902e-8

8.9968e-9

1.0188e-6

1.7484e-7

1.0825e-8

1.5713e-9

102.9

LSD

HHN

5.0461e-7

8.2845e-8

5.2177e-8

1.6311e-8

8.1809e-9

1.1408e-6

2.7163e-7

1.1050e-8

1.9433e-9

102.9

LSD

HHE

5.4892e-7

1.0036e-7

7.5643e-8

2.5019e-8

1.8040e-8

1.4025e-6

5.3439e-7

2.8433e-8

3.6850e-9

102.9

IMI

HHZ

7.0178e-7

1.1506e-7

5.3991e-8

4.8314e-8

2.8104e-8

1.2855e-6

2.7648e-7

2.9666e-8

2.8286e-9

103.9

133

IMI

HHN

2.1372e-6

3.0424e-7

1.4296e-7

5.9283e-8

4.7031e-8

3.9168e-6

6.7953e-7

7.7391e-8

6.9515e-9

103.9

133

IMI

HHE

1.1277e-6

1.6036e-7

8.0771e-8

3.3551e-8

2.4861e-8

3.0941e-6

2.8420e-7

3.6620e-8

4.1585e-9

103.9

133

*IH (Housner Intensity) calculated on the velocity spectrum (SV) between 0.1 and 0.5 s (IH0), 0.1 and 1.0 s (IH1), 0.1 and 1.5 s (IH2)

MANUAL Location - Area: Alpi Cozie , magnitude (ML): 0.8 2026-09-18 09:44:49 (UTC)

MANUAL Location - Area: Alpi Cozie , magnitude (M_L): 0.8
2026-09-18 09:44:49 (UTC)