RSNI - Manually revised location

MANUAL Location - Area: Alpi Cozie , magnitude (M_L): 0.4
2025-07-05 04:41:54 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-07-05 08:29:48

Earthquake info - Manual location

Event - ID :	250705044037
Magnitude (M_L) :	0.4 +/- 0.2
Origin Time :	2025-07-05 04:41:54.87 (UTC)
Location :	Latitude: 44.718 N, Longitude: 7.198 E
Area :	Alpi Cozie
Depth (km) :	4.37
Distances (km) :	2.8 --- Ostana 3.8 --- Crissolo 4.5 --- Oncino 7.2 --- Paesana 8.4 --- Rora 10.0 --- Barge 10.4 --- Lusernetta 10.6 --- Bagnolo Piemonte 10.7 --- Villar Pellice 11.6 --- Luserna San Giovanni 11.6 --- Bibiana 11.7 --- Torre Pellice 12.0 --- Bobbio Pellice 12.3 --- Sanfront 13.8 --- Campiglione-Fenile 14.0 --- Rifreddo 14.2 --- Angrogna 14.3 --- Envie 14.6 --- Bricherasio 15.3 --- Gambasca

Quality location estimate: Erh: 0.9 km, Erz: 1.4 km, Nf: 18, Gap: 114 °, Rms: 0.21

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.
BHB	GU	2025-07-05 04:41:58.140	0.008	0	0.01	1.60	2025-07-05 04:41:59.810	0.045	1	-0.49	0.71	14.9
PZZ	GU	2025-07-05 04:41:59.780	0.013	0	-0.01	1.61	2025-07-05 04:42:02.860	0.075	2	-0.41	0.89	25.0
RRL	GU	2025-07-05 04:42:02.580	0.020	1	0.06	1.30	2025-07-05 04:42:07.371	0.131	4	-0.38	0.93	39.9
SURF	FR	2025-07-05 04:42:02.610	0.021	1	-0.00	1.50	2025-07-05 04:42:08.010	0.124	3	-0.21	1.14	40.5
RSP	GU	2025-07-05 04:42:03.802	0.100	4	-0.06	1.30	2025-07-05 04:42:09.757	0.163	5	-0.35	0.96	48.5
ENR	GU	2025-07-05 04:42:04.660	0.028	1	-0.30	0.95	2025-07-05 04:42:11.614	0.250	6	-0.33	0.91	57.3
ISO	FR	2025-07-05 04:42:06.652	0.150	6	0.85	0.03	2025-07-05 04:42:13.180	0.230	6	-0.15	1.02	60.7
GBOS	GU	2025-07-05 04:42:07.494	0.120	5	0.02	1.13	2025-07-05 04:42:15.956	0.250	6	-0.07	0.96	73.6
LSD	GU	2025-07-05 04:42:09.753	0.220	8	0.35	0.43	2025-07-05 04:42:18.990	0.387	8	-0.51	0.63	82.9

Local magnitude (M_L) calculation results

Station	Net	Channels	Stat. Mag.	Wood-And. Ampl.	Dist. (km)	Azimuth
BHB	GU	HH	0.28	7.93e-2	14.9	21
PZZ	GU	HH	0.55	1.06e-1	25.0	196
RRL	GU	HH	0.17	7.17e-3	39.9	305
RSP	GU	HH	0.44	1.43e-2	48.5	6
ENR	GU	HH	0.74	2.60e-2	57.3	162
ISO	FR	HH	0.04	3.32e-3	60.7	191
GBOS	GU	HH	0.61	4.21e-3	73.6	136
LSD	GU	HH	0.74	8.45e-3	82.9	357

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.
(°)

BHB

HHZ

2.3961e-5

2.7870e-6

9.4715e-7

2.5011e-7

1.3423e-7

6.3972e-5

2.8698e-6

2.2596e-7

5.4539e-8

14.9

BHB

HHN

1.4564e-5

2.0118e-6

5.4612e-7

1.3838e-7

8.2734e-8

3.1350e-5

1.9103e-6

1.6233e-7

3.8792e-8

14.9

BHB

HHE

1.2620e-5

1.7047e-6

4.4466e-7

1.5687e-7

7.2880e-8

2.5159e-5

1.7560e-6

1.3752e-7

3.3215e-8

14.9

PZZ

HHZ

4.5408e-6

1.2794e-6

9.9103e-7

3.7518e-7

1.7732e-7

1.1548e-5

7.3331e-6

2.5931e-7

3.7450e-8

25.0

196

PZZ

HHN

4.5515e-6

1.3186e-6

7.8426e-7

3.2729e-7

1.5871e-7

1.4013e-5

4.7093e-6

2.3410e-7

3.7749e-8

25.0

196

PZZ

HHE

5.6935e-6

1.2753e-6

8.8984e-7

2.5606e-7

1.2533e-7

1.1636e-5

5.4435e-6

1.7368e-7

2.8434e-8

25.0

196

RRL

HHZ

1.2406e-6

1.0891e-7

3.9140e-8

1.6820e-8

6.7846e-9

2.1677e-6

1.5402e-7

1.0059e-8

2.1970e-9

39.9

305

RRL

HHN

7.9796e-7

1.1586e-7

5.9192e-8

1.8306e-8

9.4491e-9

2.9489e-6

2.3747e-7

1.3757e-8

2.7522e-9

39.9

305

RRL

HHE

7.5298e-7

1.2383e-7

6.4282e-8

1.8951e-8

1.1360e-8

2.7897e-6

2.1739e-7

1.9685e-8

3.3140e-9

39.9

305

RSP

HHZ

1.6124e-6

2.0826e-7

8.6875e-8

2.9529e-8

1.3293e-8

2.4279e-6

2.3437e-7

2.1816e-8

4.1993e-9

48.5

RSP

HHN

1.9105e-6

2.5811e-7

1.2887e-7

4.2333e-8

1.9867e-8

2.9924e-6

5.3916e-7

3.0008e-8

5.4372e-9

48.5

RSP

HHE

1.5795e-6

1.6953e-7

9.2673e-8

3.0087e-8

1.3989e-8

2.6647e-6

3.5058e-7

2.2866e-8

4.3199e-9

48.5

ENR

HHZ

2.7098e-6

3.1005e-7

1.0547e-7

4.2302e-8

2.3391e-8

5.8747e-6

4.0431e-7

3.9473e-8

7.4649e-9

57.3

162

ENR

HHN

7.9791e-6

7.0486e-7

1.7268e-7

5.7498e-8

3.1371e-8

9.8781e-6

8.4432e-7

5.8894e-8

1.4199e-8

57.3

162

ENR

HHE

8.7124e-6

7.6252e-7

1.5423e-7

4.0737e-8

2.5414e-8

8.5929e-6

4.7228e-7

5.1563e-8

1.4394e-8

57.3

162

ISO

HHZ

4.4757e-7

5.0587e-8

2.6750e-8

9.0243e-9

6.8567e-9

8.6221e-7

1.0462e-7

1.0568e-8

1.1353e-9

60.7

191

ISO

HHN

5.4548e-7

5.9267e-8

2.2716e-8

6.5619e-9

3.9403e-9

7.4914e-7

6.9885e-8

6.9019e-9

1.1476e-9

60.7

191

ISO

HHE

6.4056e-7

7.7052e-8

3.1133e-8

8.7857e-9

4.7896e-9

1.2843e-6

1.1929e-7

8.2238e-9

1.5718e-9

60.7

191

GBOS

HHZ

3.8843e-7

6.9796e-8

3.7315e-8

9.9256e-9

6.4754e-9

1.4698e-6

1.7756e-7

1.2271e-8

1.7587e-9

73.6

136

GBOS

HHN

3.7818e-7

6.0543e-8

3.8568e-8

1.8415e-8

1.0048e-8

1.0273e-6

1.7625e-7

1.4439e-8

1.3631e-9

73.6

136

GBOS

HHE

4.6958e-7

7.2472e-8

3.7588e-8

1.2134e-8

6.0370e-9

1.7343e-6

2.0986e-7

9.7959e-9

1.6683e-9

73.6

136

LSD

HHZ

5.8508e-7

7.6220e-8

4.7755e-8

2.3388e-8

7.9916e-9

1.1765e-6

1.8390e-7

1.0355e-8

1.8736e-9

82.9

357

LSD

HHN

7.2553e-7

9.4610e-8

5.4106e-8

1.5856e-8

7.5813e-9

1.7598e-6

2.8476e-7

1.1489e-8

1.8551e-9

82.9

357

LSD

HHE

9.5055e-7

1.4708e-7

8.8159e-8

2.9351e-8

1.1250e-8

2.0489e-6

3.7129e-7

1.7476e-8

2.9385e-9

82.9

357

*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 2025-07-05 04:41:54 (UTC)

MANUAL Location - Area: Alpi Cozie , magnitude (M_L): 0.4
2025-07-05 04:41:54 (UTC)