RSNI - Manually revised location

MANUAL Location - Area: Alpi Cozie , magnitude (M_L): 0.2
2025-08-14 21:23:46 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-08-15 09:38:14

Earthquake info - Manual location

Event - ID :	250814212325
Magnitude (M_L) :	0.2 +/- 0.2
Origin Time :	2025-08-14 21:23:46.311 (UTC)
Location :	Latitude: 44.589 N, Longitude: 6.735 E
Area :	Alpi Cozie
Depth (km) :	2.26
Distances (km) :	22.3 --- Bellino 23.5 --- Pontechianale 23.8 --- Acceglio 26.5 --- Casteldelfino 26.7 --- Argentera 27.9 --- Prazzo 28.6 --- Elva 31.2 --- Canosio 31.9 --- Marmora 32.3 --- Stroppo 35.6 --- Crissolo 36.0 --- Pietraporzio 36.0 --- Sampeyre 36.5 --- Macra 37.1 --- Celle di Macra 37.3 --- Oncino 37.7 --- Ostana 38.7 --- Sambuco 38.9 --- Bobbio Pellice 39.0 --- Claviere

Quality location estimate: Erh: 2.5 km, Erz: 2.5 km, Nf: 20, Gap: 172 °, Rms: 0.36

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	2025-08-14 21:23:49.440	0.015	0	0.01	2.10	2025-08-14 21:23:51.750	0.042	1	0.01	2.03	13.7
OGAG	FR	2025-08-14 21:23:50.650	0.018	0	-1.24	0.30	2025-08-14 21:23:54.800	0.082	2	-0.97	0.52	27.2
PZZ	GU	2025-08-14 21:23:52.860	0.025	1	-0.02	2.02	2025-08-14 21:23:57.569	0.097	2	-0.09	1.42	31.7
RRL	GU	2025-08-14 21:23:53.870	0.027	1	-0.04	1.88	2025-08-14 21:23:59.050	0.226	6	-0.07	1.16	37.4
VIND	IV	2025-08-14 21:23:54.411	0.020	0	-1.08	0.49	2025-08-14 21:24:01.210	0.040	0	-0.77	0.49	46.8
BHB	GU	2025-08-14 21:23:56.220	0.035	1	0.16	1.12	2025-08-14 21:24:02.160	0.290	7	-0.68	0.59	50.0
ISO	FR	2025-08-14 21:23:55.599	0.020	0	-0.69	0.38	2025-08-14 21:24:01.800	0.370	8	-1.35	0.34	51.6
ENR	GU	2025-08-14 21:23:58.686	0.020	0	0.01	1.70	2025-08-14 21:24:07.855	0.040	0	0.49	0.28	67.5
RSP	GU	2025-08-14 21:24:00.524	0.020	0	0.26	0.71	2025-08-14 21:24:09.952	0.040	0	-0.09	1.18	75.0
TURF	FR	2025-08-14 21:24:02.040	0.046	2	-0.18	1.08	2025-08-14 21:24:11.760	0.607	9	-1.71	0.22	86.0

Local magnitude (M_L) calculation results

Station	Net	Channels	Stat. Mag.	Wood-And. Ampl.	Dist. (km)	Azimuth
OGAG	FR	HH	0.01	1.54e-2	27.2	325
PZZ	GU	HH	0.23	3.25e-2	31.7	107
RRL	GU	HH	0.08	6.57e-3	37.4	7
BHB	GU	HH	0.04	4.58e-3	50.0	57
ISO	FR	HH	-0.10	3.44e-3	51.6	151
ENR	GU	HH	0.53	1.14e-2	67.5	126
RSP	GU	HH	0.19	3.19e-3	75.0	34
TURF	FR	HH	0.40	3.56e-3	86.0	142

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

7.8140e-7

1.8273e-7

1.5677e-7

6.5738e-8

2.8871e-8

2.3584e-6

8.5347e-7

3.3987e-8

4.9723e-9

27.2

325

OGAG

HHN

1.4877e-6

2.4045e-7

1.3681e-7

3.9770e-8

2.3205e-8

4.1027e-6

6.6753e-7

3.5560e-8

6.4826e-9

27.2

325

OGAG

HHE

1.4806e-6

2.3083e-7

1.4138e-7

4.9484e-8

2.6453e-8

2.9856e-6

7.1690e-7

3.8510e-8

6.1064e-9

27.2

325

PZZ

HHZ

2.1151e-6

3.4597e-7

2.3574e-7

5.9705e-8

3.4899e-8

6.0612e-6

1.1339e-6

5.5382e-8

1.0244e-8

31.7

107

PZZ

HHN

2.0612e-6

3.6198e-7

2.0748e-7

5.7881e-8

3.3214e-8

6.4289e-6

8.9719e-7

5.5343e-8

7.7324e-9

31.7

107

PZZ

HHE

1.8931e-6

3.9572e-7

3.0026e-7

7.6532e-8

3.5859e-8

6.6174e-6

1.9369e-6

5.5110e-8

1.0173e-8

31.7

107

RRL

HHZ

6.1591e-7

8.3406e-8

3.9659e-8

1.4438e-8

6.4976e-9

1.1879e-6

1.3515e-7

9.8165e-9

1.9450e-9

37.4

RRL

HHN

5.6483e-7

1.1686e-7

6.7774e-8

1.7676e-8

9.0191e-9

2.2181e-6

2.8195e-7

1.1980e-8

2.7425e-9

37.4

RRL

HHE

1.0284e-6

1.3820e-7

5.6950e-8

1.9972e-8

1.0264e-8

2.7257e-6

2.6341e-7

1.6724e-8

2.8901e-9

37.4

BHB

HHZ

8.9005e-7

1.0429e-7

4.5479e-8

1.2755e-8

6.8348e-9

2.4544e-6

1.6206e-7

1.1111e-8

2.2071e-9

50.0

BHB

HHN

6.0003e-7

9.9948e-8

4.4926e-8

1.1516e-8

6.6147e-9

1.9378e-6

1.9444e-7

1.1356e-8

2.1123e-9

50.0

BHB

HHE

6.3231e-7

8.1880e-8

3.4960e-8

1.2435e-8

5.7393e-9

1.5837e-6

1.6360e-7

9.3858e-9

1.7597e-9

50.0

ISO

HHZ

7.4854e-7

7.0950e-8

3.0436e-8

7.1811e-9

3.9096e-9

1.3436e-6

1.0679e-7

6.2478e-9

1.4475e-9

51.6

151

ISO

HHN

7.8621e-7

8.2866e-8

3.0709e-8

9.4326e-9

4.9524e-9

1.3287e-6

1.0213e-7

6.3489e-9

1.6983e-9

51.6

151

ISO

HHE

9.0302e-7

9.4691e-8

3.1516e-8

1.1282e-8

4.9470e-9

1.5481e-6

1.3567e-7

8.4988e-9

1.8943e-9

51.6

151

ENR

HHZ

1.4796e-6

1.5156e-7

4.2684e-8

1.5737e-8

1.0013e-8

2.6815e-6

1.6648e-7

1.8116e-8

3.2701e-9

67.5

126

ENR

HHN

3.5146e-6

3.0318e-7

8.0218e-8

2.7649e-8

1.7639e-8

4.3639e-6

3.7344e-7

3.3239e-8

6.1582e-9

67.5

126

ENR

HHE

4.5303e-6

3.8638e-7

7.0670e-8

2.2147e-8

1.5884e-8

3.4923e-6

3.1266e-7

3.6282e-8

6.9556e-9

67.5

126

RSP

HHZ

3.6860e-7

4.6364e-8

2.1197e-8

9.7939e-9

5.3594e-9

7.5460e-7

7.6046e-8

6.6696e-9

1.0150e-9

75.0

RSP

HHN

4.1374e-7

5.5384e-8

2.9762e-8

1.0399e-8

4.8251e-9

1.0493e-6

1.0602e-7

7.1218e-9

1.1772e-9

75.0

RSP

HHE

4.5411e-7

6.2284e-8

3.0754e-8

9.8191e-9

6.1404e-9

1.1575e-6

1.3353e-7

9.0163e-9

1.3261e-9

75.0

TURF

HHZ

2.9898e-7

4.5333e-8

2.3433e-8

1.1371e-8

7.4296e-9

5.1430e-7

8.4936e-8

1.0202e-8

9.5112e-10

86.0

142

TURF

HHN

2.0519e-7

3.7195e-8

2.7409e-8

1.1876e-8

6.7621e-9

6.2595e-7

1.0375e-7

1.1489e-8

1.1961e-9

86.0

142

TURF

HHE

1.4435e-7

3.2770e-8

2.9435e-8

1.8178e-8

8.3453e-9

3.7866e-7

1.6819e-7

1.2881e-8

1.1343e-9

86.0

142

*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): 0.2 2025-08-14 21:23:46 (UTC)

MANUAL Location - Area: Alpi Cozie , magnitude (M_L): 0.2
2025-08-14 21:23:46 (UTC)