RSNI - Manually revised location

MANUAL Location - Area: Alpi Cozie , magnitude (M_L): 0.4
2025-08-26 16:53:32 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-08-27 08:56:11

Earthquake info - Manual location

Event - ID :	250826165309
Magnitude (M_L) :	0.4 +/- 0.2
Origin Time :	2025-08-26 16:53:32.261 (UTC)
Location :	Latitude: 44.379 N, Longitude: 7.271 E
Area :	Alpi Cozie
Depth (km) :	10.60
Distances (km) :	4.6 --- Pradleves 5.3 --- Monterosso Grana 5.8 --- Castelmagno 7.3 --- Demonte 8.3 --- Aisone 9.3 --- Valloriate 9.4 --- Valgrana 10.6 --- Montemale di Cuneo 10.6 --- Rittana 10.9 --- Vinadio 11.1 --- Cartignano 11.4 --- Moiola 11.7 --- Gaiola 12.3 --- Dronero 12.4 --- San Damiano Macra 12.4 --- Roccabruna 13.1 --- Bernezzo 13.2 --- Caraglio 13.7 --- Celle di Macra 14.0 --- Roccasparvera

Quality location estimate: Erh: 2.3 km, Erz: 1.4 km, Nf: 20, Gap: 149 °, Rms: 0.20

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.
STV	GU	2025-08-26 16:53:36.155	0.020	0	0.27	0.58	2025-08-26 16:53:38.317	0.040	0	-0.06	1.60	19.3
PZZ	GU	2025-08-26 16:53:37.241	0.020	0	0.50	0.34	2025-08-26 16:53:39.954	0.040	0	0.02	1.73	22.3
ENR	GU	2025-08-26 16:53:36.855	0.020	0	0.28	0.54	2025-08-26 16:53:39.568	0.040	0	0.03	1.73	23.5
ISO	FR	2025-08-26 16:53:38.344	0.020	0	0.50	0.34	2025-08-26 16:53:41.607	0.040	0	0.02	1.67	30.2
SURF	FR	2025-08-26 16:53:39.748	0.060	2	0.00	1.70	2025-08-26 16:53:44.740	0.040	0	-0.41	0.33	39.5
TURF	FR	2025-08-26 16:53:41.212	0.020	0	0.12	1.33	2025-08-26 16:53:46.440	0.040	0	-0.94	0.18	47.1
GBOS	GU	2025-08-26 16:53:41.065	0.020	0	0.01	1.73	2025-08-26 16:53:47.079	0.040	0	0.00	1.44	49.1
SAOF	FR	2025-08-26 16:53:41.540	0.020	0	-0.07	1.54	2025-08-26 16:53:47.555	0.040	0	-0.62	0.28	50.3
MVIF	FR	2025-08-26 16:53:42.624	0.020	0	0.02	1.65	2025-08-26 16:53:49.510	0.040	0	-0.59	0.31	55.5
IMI	GU	2025-08-26 16:53:44.759	0.020	0	-0.21	0.81	2025-08-26 16:53:52.975	0.040	0	-1.00	0.17	72.8

Local magnitude (M_L) calculation results

Station	Net	Channels	Stat. Mag.	Wood-And. Ampl.	Dist. (km)	Azimuth
STV	GU	HH	0.47	5.68e-2	19.3	164
ENR	GU	HH	0.76	1.55e-1	23.5	145
ISO	FR	HH	0.16	1.80e-2	30.2	219
TURF	FR	HH	0.04	5.71e-3	47.1	168
GBOS	GU	HH	0.45	6.84e-3	49.1	108
IMI	GU	HH	0.51	8.95e-3	72.8	136

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.
(°)

STV

HHZ

5.0947e-6

6.2762e-7

2.2864e-7

8.1093e-8

5.2265e-8

9.0636e-6

1.0646e-6

8.3212e-8

1.3493e-8

19.3

164

STV

HHN

5.2244e-6

6.8525e-7

1.8463e-7

5.2302e-8

2.9397e-8

1.0319e-5

7.4681e-7

5.4619e-8

1.3404e-8

19.3

164

STV

HHE

8.9755e-6

1.5047e-6

3.9582e-7

1.4667e-7

8.8287e-8

1.6875e-5

1.7265e-6

1.5602e-7

3.4928e-8

19.3

164

PZZ

HHZ

6.7650e-6

9.0255e-7

3.3561e-7

9.4069e-8

4.5455e-8

1.4708e-5

1.5524e-6

7.5175e-8

1.6405e-8

22.3

319

PZZ

HHN

4.6683e-6

6.2056e-7

3.0223e-7

8.1753e-8

4.2067e-8

9.6991e-6

1.6810e-6

6.7011e-8

1.4738e-8

22.3

319

PZZ

HHE

5.3863e-6

7.7999e-7

3.4374e-7

9.5250e-8

4.9427e-8

1.4098e-5

1.4049e-6

7.2129e-8

1.4635e-8

22.3

319

ENR

HHZ

2.2392e-5

1.9138e-6

3.7757e-7

1.5058e-7

7.1423e-8

1.9008e-5

1.7927e-6

1.5390e-7

4.2929e-8

23.5

145

ENR

HHN

5.9794e-5

5.4226e-6

8.3037e-7

2.4027e-7

1.5566e-7

6.1696e-5

3.3694e-6

3.9524e-7

1.0864e-7

23.5

145

ENR

HHE

6.3753e-5

5.6407e-6

7.1269e-7

2.1575e-7

1.3997e-7

4.7446e-5

2.8534e-6

3.6019e-7

9.5104e-8

23.5

145

ISO

HHZ

2.8516e-6

3.5596e-7

1.1503e-7

3.3679e-8

2.1117e-8

5.2461e-6

4.5142e-7

4.0086e-8

7.8245e-9

30.2

219

ISO

HHN

3.9839e-6

4.3427e-7

1.0921e-7

3.1581e-8

2.0788e-8

5.7582e-6

2.9984e-7

4.0301e-8

8.5261e-9

30.2

219

ISO

HHE

4.7601e-6

5.0218e-7

1.2198e-7

3.9021e-8

2.2976e-8

5.9473e-6

4.5716e-7

3.9685e-8

9.6317e-9

30.2

219

TURF

HHZ

4.2725e-7

7.1011e-8

3.2664e-8

1.1179e-8

1.0596e-8

1.2837e-6

1.4001e-7

1.4574e-8

1.5653e-9

47.1

168

TURF

HHN

5.9812e-7

8.9270e-8

4.0562e-8

1.5870e-8

1.1124e-8

1.6278e-6

1.5980e-7

1.7772e-8

2.2532e-9

47.1

168

TURF

HHE

4.4209e-7

6.2847e-8

4.4322e-8

2.4242e-8

1.1826e-8

1.2104e-6

1.8762e-7

1.5292e-8

1.9912e-9

47.1

168

GBOS

HHZ

9.7069e-7

1.5852e-7

5.6078e-8

1.6356e-8

1.0116e-8

2.3127e-6

1.6517e-7

1.7484e-8

3.6382e-9

49.1

108

GBOS

HHN

6.6740e-7

1.3078e-7

4.4032e-8

1.6653e-8

7.8872e-9

1.9297e-6

1.5207e-7

9.4558e-9

2.0745e-9

49.1

108

GBOS

HHE

9.2912e-7

1.3208e-7

5.8400e-8

1.3339e-8

7.9183e-9

2.2075e-6

1.6731e-7

1.3871e-8

3.0014e-9

49.1

108

SAOF

HHZ

2.9687e-7

5.9355e-8

4.6180e-8

1.4853e-8

8.5102e-9

7.1220e-7

2.8384e-7

1.5585e-8

1.5282e-9

50.3

152

SAOF

HHN

2.8242e-7

4.2725e-8

3.4072e-8

1.4681e-8

8.3132e-9

6.3836e-7

1.7410e-7

1.1086e-8

1.1978e-9

50.3

152

SAOF

HHE

3.3309e-7

5.1084e-8

3.3151e-8

1.4750e-8

7.1227e-9

7.1976e-7

2.0407e-7

8.7233e-9

1.3535e-9

50.3

152

IMI

HHZ

3.1656e-7

4.2275e-8

2.8728e-8

1.7045e-8

1.4054e-8

1.2655e-6

1.1681e-7

2.3704e-8

1.0472e-9

72.8

136

IMI

HHN

1.5544e-6

2.2306e-7

7.9247e-8

2.8724e-8

1.8014e-8

2.2857e-6

3.2110e-7

2.8405e-8

4.0165e-9

72.8

136

IMI

HHE

5.7517e-7

7.8850e-8

4.3663e-8

2.0735e-8

1.4211e-8

1.0561e-6

1.7112e-7

1.9534e-8

1.9213e-9

72.8

136

*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): 0.4 2025-08-26 16:53:32 (UTC)

MANUAL Location - Area: Alpi Cozie , magnitude (M_L): 0.4
2025-08-26 16:53:32 (UTC)