RSNI - Manually revised location

MANUAL Location - Area: Alpi Cozie , magnitude (M_L): 0.5
2025-10-16 20:16:13 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-10-17 07:34:47

Earthquake info - Manual location

Event - ID :	251016201542
Magnitude (M_L) :	0.5 +/- 0.2
Origin Time :	2025-10-16 20:16:13.313 (UTC)
Location :	Latitude: 44.872 N, Longitude: 6.839 E
Area :	Alpi Cozie
Depth (km) :	9.52
Distances (km) :	7.8 --- Sauze di Cesana 9.7 --- Cesana Torinese 10.1 --- Sestriere 10.3 --- Claviere 16.6 --- Prali 17.4 --- Sauze d Oulx 17.6 --- Pragelato 18.0 --- Oulx 18.4 --- Salza di Pinerolo 19.7 --- Massello 22.7 --- Salbertrand 23.0 --- Perrero 23.1 --- Bobbio Pellice 24.7 --- Usseaux 24.8 --- Fenestrelle 25.4 --- Bardonecchia 26.0 --- Villar Pellice 26.1 --- Exilles 27.3 --- Roure 28.6 --- Pomaretto

Quality location estimate: Erh: 1.3 km, Erz: 1.5 km, Nf: 20, Gap: 80 °, Rms: 0.24

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.
RRL	GU	2025-10-16 20:16:16.470	0.006	0	0.36	0.92	2025-10-16 20:16:18.026	0.050	1	0.00	1.69	13.5
OGAG	FR	2025-10-16 20:16:18.720	0.013	0	-0.02	1.69	2025-10-16 20:16:21.643	0.100	2	-0.94	0.20	27.6
BHB	GU	2025-10-16 20:16:20.580	0.018	0	0.38	0.88	2025-10-16 20:16:24.700	0.116	3	-0.28	0.84	35.2
OGMO	FR	2025-10-16 20:16:21.138	0.020	0	0.04	1.61	2025-10-16 20:16:25.517	0.119	3	-0.99	0.20	40.4
RSP	GU	2025-10-16 20:16:22.393	0.020	0	0.38	0.85	2025-10-16 20:16:28.100	0.148	4	0.09	1.28	46.7
PZZ	GU	2025-10-16 20:16:22.090	0.020	0	0.03	1.59	2025-10-16 20:16:28.000	0.153	4	-0.40	0.70	47.4
LATO	IV	2025-10-16 20:16:25.265	0.020	0	-0.20	0.97	2025-10-16 20:16:33.786	0.040	0	-0.15	1.13	68.9
LSD	GU	2025-10-16 20:16:26.120	0.020	0	0.08	1.40	2025-10-16 20:16:34.217	0.040	0	-0.56	0.49	70.3
ISO	FR	2025-10-16 20:16:26.855	0.020	0	-0.54	0.42	2025-10-16 20:16:37.175	0.040	0	-0.06	1.20	79.0
ENR	GU	2025-10-16 20:16:28.220	0.020	0	0.13	1.28	2025-10-16 20:16:38.949	0.100	2	0.45	0.66	85.6

Local magnitude (M_L) calculation results

Station	Net	Channels	Stat. Mag.	Wood-And. Ampl.	Dist. (km)	Azimuth
RRL	GU	HH	0.71	1.88e-1	13.5	325
OGAG	FR	HH	0.32	3.02e-2	27.6	248
BHB	GU	HH	0.22	1.39e-2	35.2	97
RSP	GU	HH	0.43	1.51e-2	46.7	47
PZZ	GU	HH	0.72	4.52e-2	47.4	152
LSD	GU	HH	0.39	5.47e-3	70.3	19
ISO	FR	HH	0.30	3.43e-3	79.0	168
ENR	GU	HH	0.60	7.99e-3	85.6	147

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.
(°)

RRL

HHZ

2.4466e-5

2.6684e-6

5.9132e-7

1.9679e-7

1.2437e-7

3.8038e-5

2.1888e-6

2.4514e-7

5.0472e-8

13.5

325

RRL

HHN

2.5750e-5

3.8753e-6

1.2969e-6

3.2873e-7

1.9926e-7

6.3613e-5

4.3832e-6

3.6186e-7

8.5137e-8

13.5

325

RRL

HHE

1.5540e-5

2.7999e-6

1.3612e-6

5.0622e-7

2.8546e-7

2.4113e-5

7.2719e-6

4.2439e-7

7.1309e-8

13.5

325

OGAG

HHZ

1.2320e-6

2.5415e-7

1.7050e-7

7.4529e-8

3.8609e-8

5.0039e-6

1.0258e-6

5.4492e-8

7.7748e-9

27.6

248

OGAG

HHN

1.6776e-6

3.9313e-7

2.2288e-7

9.9995e-8

4.6517e-8

3.3636e-6

1.0196e-6

6.1031e-8

9.2331e-9

27.6

248

OGAG

HHE

1.3183e-6

1.7974e-7

1.4421e-7

6.5868e-8

3.5381e-8

1.7867e-6

7.2730e-7

4.9336e-8

5.3477e-9

27.6

248

BHB

HHZ

2.9091e-6

2.8241e-7

1.2182e-7

4.0270e-8

2.6053e-8

6.8874e-6

5.3444e-7

5.1145e-8

5.9662e-9

35.2

BHB

HHN

2.3024e-6

2.5174e-7

9.9319e-8

2.8525e-8

2.1275e-8

3.9212e-6

3.2146e-7

4.5008e-8

5.8595e-9

35.2

BHB

HHE

2.6368e-6

2.7563e-7

1.1505e-7

3.9827e-8

2.0275e-8

5.2536e-6

4.3210e-7

4.1580e-8

5.9453e-9

35.2

RSP

HHZ

1.7388e-6

1.9566e-7

6.7272e-8

2.2016e-8

1.0191e-8

2.6877e-6

1.9557e-7

1.8149e-8

3.5823e-9

46.7

RSP

HHN

1.7392e-6

2.4435e-7

1.3446e-7

3.9409e-8

2.2651e-8

4.3028e-6

4.7623e-7

3.5979e-8

5.8732e-9

46.7

RSP

HHE

1.7744e-6

2.6724e-7

1.0729e-7

2.5313e-8

1.4573e-8

5.4870e-6

3.4857e-7

2.7780e-8

5.7761e-9

46.7

PZZ

HHZ

3.1506e-6

5.7362e-7

3.2722e-7

8.7253e-8

4.2652e-8

7.1678e-6

1.2058e-6

6.9604e-8

1.2952e-8

47.4

152

PZZ

HHN

3.5651e-6

6.2253e-7

3.4608e-7

8.5302e-8

5.5235e-8

7.0646e-6

1.7422e-6

1.0941e-7

1.6441e-8

47.4

152

PZZ

HHE

3.2190e-6

7.1212e-7

4.2431e-7

1.1221e-7

5.5722e-8

8.3542e-6

1.9144e-6

8.6252e-8

1.7348e-8

47.4

152

LSD

HHZ

5.7060e-7

7.2641e-8

3.6202e-8

9.4815e-9

5.5126e-9

1.0706e-6

1.2160e-7

8.0359e-9

1.4407e-9

70.3

LSD

HHN

7.6203e-7

8.5517e-8

2.9532e-8

9.1626e-9

4.5627e-9

1.5386e-6

1.3200e-7

8.2514e-9

1.5097e-9

70.3

LSD

HHE

1.3072e-6

1.1042e-7

4.6696e-8

1.2832e-8

6.5294e-9

1.3670e-6

1.7968e-7

1.2056e-8

1.9978e-9

70.3

ISO

HHZ

2.3508e-7

2.9133e-8

1.9674e-8

8.1594e-9

5.8576e-9

4.4262e-7

9.5454e-8

7.6492e-9

8.3614e-10

79.0

168

ISO

HHN

2.3443e-7

3.2336e-8

1.4535e-8

8.9785e-9

1.2698e-8

5.4606e-7

9.1367e-8

2.0170e-8

3.3228e-9

79.0

168

ISO

HHE

2.6075e-7

3.6307e-8

2.0248e-8

1.2463e-8

1.2942e-8

7.0458e-7

1.0994e-7

1.8891e-8

2.2201e-9

79.0

168

ENR

HHZ

7.9799e-7

8.7375e-8

4.2363e-8

2.0757e-8

1.2471e-8

1.3140e-6

1.8993e-7

1.5756e-8

1.9814e-9

85.6

147

ENR

HHN

1.3866e-6

1.5139e-7

6.9725e-8

3.5908e-8

1.9278e-8

2.5508e-6

3.0642e-7

2.5950e-8

4.0622e-9

85.6

147

ENR

HHE

1.4853e-6

2.0957e-7

8.3530e-8

3.1560e-8

1.8210e-8

2.3589e-6

3.4429e-7

2.2066e-8

3.9120e-9

85.6

147

*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): 0.5 2025-10-16 20:16:13 (UTC)

MANUAL Location - Area: Alpi Cozie , magnitude (M_L): 0.5
2025-10-16 20:16:13 (UTC)