RSNI - Manually revised location

MANUAL Location - Area: Alpi Cozie , magnitude (M_L): 0.1
2025-04-11 02:40:27 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-04-11 06:52:06

Earthquake info - Manual location

Event - ID :	250411023907
Magnitude (M_L) :	0.1 +/- 0.2
Origin Time :	2025-04-11 02:40:27.614 (UTC)
Location :	Latitude: 44.583 N, Longitude: 6.709 E
Area :	Alpi Cozie
Depth (km) :	5.12
Distances (km) :	24.3 --- Bellino 25.2 --- Acceglio 25.6 --- Pontechianale 27.4 --- Argentera 28.6 --- Casteldelfino 29.5 --- Prazzo 30.5 --- Elva 32.7 --- Canosio 33.4 --- Marmora 34.1 --- Stroppo 36.9 --- Pietraporzio 37.8 --- Crissolo 38.1 --- Sampeyre 38.3 --- Macra 38.9 --- Celle di Macra 39.5 --- Oncino 39.7 --- Sambuco 39.8 --- Claviere 39.9 --- Ostana 41.0 --- Bobbio Pellice

Quality location estimate: Erh: 1.2 km, Erz: 1.7 km, Nf: 22, Gap: 181 °, 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.
SURF	FR	2025-04-11 02:40:31.150	0.009	0	0.17	1.21	2025-04-11 02:40:33.460	0.050	1	-0.03	1.71	14.9
OGAG	FR	2025-04-11 02:40:32.762	0.080	3	-0.37	0.45	2025-04-11 02:40:36.173	0.075	2	-0.84	0.31	27.2
PZZ	GU	2025-04-11 02:40:34.296	0.020	0	-0.11	1.29	2025-04-11 02:40:39.270	0.103	3	-0.05	1.45	33.9
RRL	GU	2025-04-11 02:40:35.354	0.020	0	0.02	1.78	2025-04-11 02:40:40.757	0.040	0	-0.02	1.56	38.8
ISO	FR	2025-04-11 02:40:37.410	0.020	0	-0.01	1.70	2025-04-11 02:40:43.616	0.040	0	-0.52	0.48	52.3
BHB	GU	2025-04-11 02:40:37.575	0.020	0	0.06	1.70	2025-04-11 02:40:44.612	0.040	0	0.10	1.39	52.3
ENR	GU	2025-04-11 02:40:40.134	0.080	3	0.16	1.28	2025-04-11 02:40:49.434	0.200	5	0.83	0.16	68.9
OGMO	FR	2025-04-11 02:40:40.565	0.020	0	0.04	1.62	2025-04-11 02:40:49.011	0.040	0	-0.71	0.43	69.7
RSP	GU	2025-04-11 02:40:42.285	0.020	0	0.64	0.15	2025-04-11 02:40:51.847	0.040	0	0.31	0.83	76.9
TURF	FR	2025-04-11 02:40:43.550	0.045	2	0.16	1.27	2025-04-11 02:40:53.780	0.040	0	-0.73	0.43	86.8
MLIG	IV	2025-04-11 02:40:45.622	0.020	0	-0.42	0.59	2025-04-11 02:40:57.856	0.040	0	-1.08	0.21	102.0

Local magnitude (M_L) calculation results

Station	Net	Channels	Stat. Mag.	Wood-And. Ampl.	Dist. (km)	Azimuth
OGAG	FR	HH	-0.09	1.21e-2	27.2	330
PZZ	GU	HH	0.17	2.46e-2	33.9	105
RRL	GU	HH	0.07	6.06e-3	38.8	10
ISO	FR	HH	-0.21	2.56e-3	52.3	148
BHB	GU	HH	0.10	4.81e-3	52.3	57
ENR	GU	HH	0.55	1.13e-2	68.9	125
RSP	GU	HH	-0.17	1.33e-3	76.9	35
TURF	FR	HH	0.14	1.91e-3	86.8	141

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.
(°)

OGAG

HHZ

1.0736e-6

1.8061e-7

9.6584e-8

4.3221e-8

1.8322e-8

1.9706e-6

4.5139e-7

2.3304e-8

4.2088e-9

27.2

330

OGAG

HHN

7.6224e-7

1.6096e-7

9.9288e-8

3.5104e-8

1.5015e-8

2.1720e-6

5.0452e-7

2.2958e-8

3.9853e-9

27.2

330

OGAG

HHE

9.9049e-7

1.2995e-7

1.0420e-7

3.9597e-8

2.0062e-8

1.8301e-6

4.6161e-7

2.4963e-8

3.0675e-9

27.2

330

PZZ

HHZ

1.9286e-6

3.1965e-7

1.9643e-7

5.0561e-8

2.5396e-8

5.0254e-6

1.2286e-6

4.1066e-8

8.2692e-9

33.9

105

PZZ

HHN

1.9858e-6

2.6916e-7

1.8828e-7

6.1813e-8

3.0464e-8

4.4934e-6

9.0808e-7

4.6878e-8

6.6139e-9

33.9

105

PZZ

HHE

1.9489e-6

3.3480e-7

2.5439e-7

6.3818e-8

3.3755e-8

6.3062e-6

1.8497e-6

5.3060e-8

9.6973e-9

33.9

105

RRL

HHZ

4.2606e-7

5.9834e-8

3.0124e-8

1.4840e-8

7.2542e-9

8.6221e-7

1.1108e-7

1.0206e-8

1.3162e-9

38.8

RRL

HHN

4.8824e-7

1.0949e-7

5.5224e-8

1.9209e-8

9.4558e-9

2.1368e-6

2.1021e-7

1.4047e-8

2.8338e-9

38.8

RRL

HHE

4.3976e-7

6.4690e-8

4.3959e-8

1.7430e-8

7.2839e-9

9.5050e-7

1.7092e-7

1.0502e-8

1.4921e-9

38.8

ISO

HHZ

5.0774e-7

5.6068e-8

1.8080e-8

5.4758e-9

3.5637e-9

7.3064e-7

6.3934e-8

5.3282e-9

1.0922e-9

52.3

148

ISO

HHN

5.7665e-7

6.5602e-8

1.9377e-8

5.9985e-9

2.9447e-9

1.1737e-6

5.7586e-8

4.8801e-9

1.3066e-9

52.3

148

ISO

HHE

5.8868e-7

7.2075e-8

1.8989e-8

6.9789e-9

3.2678e-9

1.0600e-6

7.5302e-8

6.4257e-9

1.4386e-9

52.3

148

BHB

HHZ

6.1569e-7

9.7856e-8

4.5167e-8

1.9419e-8

7.0912e-9

1.5176e-6

1.3488e-7

1.0664e-8

1.8861e-9

52.3

BHB

HHN

4.3168e-7

5.6390e-8

3.4851e-8

1.2992e-8

5.6142e-9

1.1397e-6

1.4178e-7

8.0092e-9

1.3300e-9

52.3

BHB

HHE

5.4695e-7

8.8170e-8

3.9454e-8

1.7190e-8

6.7932e-9

1.3110e-6

1.8587e-7

1.0416e-8

2.0590e-9

52.3

ENR

HHZ

1.1920e-6

1.1998e-7

3.7015e-8

1.3454e-8

9.8483e-9

1.7295e-6

1.5317e-7

1.5788e-8

2.4377e-9

68.9

125

ENR

HHN

3.0306e-6

2.9688e-7

6.6817e-8

2.7248e-8

1.4538e-8

3.1801e-6

2.4384e-7

2.3102e-8

6.0318e-9

68.9

125

ENR

HHE

4.0942e-6

3.7349e-7

7.4994e-8

2.1618e-8

1.3001e-8

3.7755e-6

2.5753e-7

2.5583e-8

6.7471e-9

68.9

125

RSP

HHZ

1.1847e-7

1.2284e-8

6.9949e-9

3.9616e-9

2.1813e-9

2.3486e-7

3.1626e-8

3.0217e-9

3.0786e-10

76.9

RSP

HHN

1.6182e-7

2.0280e-8

1.0986e-8

7.4573e-9

5.8718e-9

3.5575e-7

4.1033e-8

6.6441e-9

9.2486e-10

76.9

RSP

HHE

1.2977e-7

2.0707e-8

1.0753e-8

5.1285e-9

2.3649e-9

3.3179e-7

5.2426e-8

3.0223e-9

4.1464e-10

76.9

TURF

HHZ

2.7156e-7

2.6193e-8

1.3307e-8

6.4417e-9

4.9027e-9

4.0823e-7

5.4296e-8

6.0893e-9

5.2658e-10

86.8

141

TURF

HHN

1.5569e-7

2.7340e-8

1.7904e-8

7.9586e-9

4.7683e-9

5.1501e-7

7.0156e-8

6.1984e-9

6.0276e-10

86.8

141

TURF

HHE

1.5863e-7

1.9640e-8

1.5459e-8

9.4023e-9

6.1715e-9

3.3812e-7

9.0346e-8

8.1987e-9

6.4742e-10

86.8

141

*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): 0.1 2025-04-11 02:40:27 (UTC)

MANUAL Location - Area: Alpi Cozie , magnitude (M_L): 0.1
2025-04-11 02:40:27 (UTC)