RSNI - Manually revised location

MANUAL Location - Area: Alpi Cozie , magnitude (M_L): 0.3
2025-07-03 22:53:31 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-07-04 07:29:04

Earthquake info - Manual location

Event - ID :	250703225305
Magnitude (M_L) :	0.3 +/- 0.2
Origin Time :	2025-07-03 22:53:31.311 (UTC)
Location :	Latitude: 44.447 N, Longitude: 7.264 E
Area :	Alpi Cozie
Depth (km) :	11.28
Distances (km) :	3.2 --- Pradleves 4.0 --- Cartignano 4.8 --- San Damiano Macra 5.8 --- Castelmagno 6.2 --- Monterosso Grana 7.1 --- Roccabruna 7.8 --- Celle di Macra 8.3 --- Dronero 9.0 --- Montemale di Cuneo 9.1 --- Macra 10.0 --- Valgrana 10.2 --- Villar San Costanzo 12.7 --- Valmala 12.8 --- Stroppo 13.4 --- Caraglio 13.5 --- Marmora 13.7 --- Melle 14.1 --- Frassino 14.4 --- Canosio 14.7 --- Demonte

Quality location estimate: Erh: 0.7 km, Erz: 0.7 km, Nf: 21, Gap: 116 °, Rms: 0.31

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.
PZZ	GU	2025-07-03 22:53:35.030	0.013	0	0.03	1.33	2025-07-03 22:53:37.185	0.058	1	-0.45	1.25	18.5
VIND	IV	2025-07-03 22:53:35.216	0.020	0	-0.02	1.41	2025-07-03 22:53:37.418	0.040	0	-0.55	1.11	20.2
STV	GU	2025-07-03 22:53:36.183	0.080	3	0.10	0.92	2025-07-03 22:53:38.976	0.090	2	-0.41	1.18	25.9
ENR	GU	2025-07-03 22:53:36.710	0.019	0	-0.01	1.42	2025-07-03 22:53:40.189	0.088	2	-0.27	1.01	29.8
ISO	FR	2025-07-03 22:53:38.390	0.023	1	0.50	0.11	2025-07-03 22:53:42.311	0.266	7	-0.04	0.96	35.9
SURF	FR	2025-07-03 22:53:38.430	0.023	1	-0.01	1.34	2025-07-03 22:53:43.190	0.113	3	-0.45	1.12	37.7
BHB	GU	2025-07-03 22:53:38.670	0.220	8	-0.45	1.04	2025-07-03 22:53:43.970	0.156	4	-0.52	1.00	44.8
GBOS	GU	2025-07-03 22:53:40.513	0.150	6	-0.09	1.08	2025-07-03 22:53:46.790	0.157	4	-0.23	1.11	52.6
TURF	FR	2025-07-03 22:53:41.685	0.180	7	0.35	0.37	2025-07-03 22:53:47.740	0.315	7	-0.74	0.61	54.6
MLIG	IV	2025-07-03 22:53:42.131	0.100	4	-0.48	1.13	--:--	-.---	-	-.--	-.--	62.0
MGRO	GU	2025-07-03 22:53:42.173	0.120	5	-0.55	1.01	2025-07-03 22:53:50.060	0.259	7	-0.82	0.50	63.8

Local magnitude (M_L) calculation results

Station	Net	Channels	Stat. Mag.	Wood-And. Ampl.	Dist. (km)	Azimuth
PZZ	GU	HH	0.29	9.96e-2	18.5	300
STV	GU	HH	0.06	1.27e-2	25.9	167
ENR	GU	HH	0.62	7.22e-2	29.8	153
BHB	GU	HH	0.12	6.93e-3	44.8	360
TURF	FR	HH	0.14	5.23e-3	54.6	169
MGRO	GU	HH	0.64	1.20e-2	63.8	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.
(°)

PZZ

HHZ

1.5504e-5

1.6718e-6

9.5727e-7

2.7596e-7

1.4508e-7

2.6040e-5

4.7485e-6

2.3469e-7

3.7676e-8

18.5

300

PZZ

HHN

2.4479e-5

2.9856e-6

8.5823e-7

2.3423e-7

1.3571e-7

4.2693e-5

2.9476e-6

2.5035e-7

5.6482e-8

18.5

300

PZZ

HHE

1.8486e-5

2.6974e-6

1.0080e-6

2.5716e-7

1.1515e-7

3.0408e-5

4.6749e-6

2.1660e-7

5.4271e-8

18.5

300

STV

HHZ

2.1366e-6

2.2791e-7

7.2110e-8

1.7769e-8

1.0013e-8

3.7616e-6

2.0275e-7

1.7192e-8

4.1025e-9

25.9

167

STV

HHN

3.2570e-6

2.9869e-7

6.0754e-8

1.9739e-8

1.2373e-8

4.3753e-6

2.3421e-7

2.5889e-8

6.5028e-9

25.9

167

STV

HHE

2.8961e-6

3.5684e-7

8.3296e-8

2.1806e-8

1.3413e-8

4.7407e-6

2.7209e-7

2.8495e-8

6.7046e-9

25.9

167

ENR

HHZ

8.1302e-6

1.0791e-6

2.5323e-7

7.8818e-8

3.9156e-8

1.2569e-5

7.8976e-7

7.7577e-8

2.2734e-8

29.8

153

ENR

HHN

2.6153e-5

1.9662e-6

3.3386e-7

8.0472e-8

5.0318e-8

1.8791e-5

1.3012e-6

1.2277e-7

3.6590e-8

29.8

153

ENR

HHE

2.5890e-5

2.1815e-6

4.9215e-7

1.1179e-7

7.6724e-8

2.6338e-5

1.4699e-6

1.5517e-7

3.9620e-8

29.8

153

ISO

HHZ

7.9229e-7

1.0101e-7

4.7071e-8

1.9025e-8

1.0463e-8

1.2186e-6

2.0977e-7

1.6958e-8

2.7927e-9

35.9

210

ISO

HHN

9.8994e-7

9.7666e-8

4.3755e-8

1.2954e-8

7.4395e-9

1.3141e-6

1.8354e-7

1.1631e-8

2.3484e-9

35.9

210

ISO

HHE

9.3711e-7

1.0006e-7

5.4292e-8

1.8995e-8

1.0673e-8

1.6120e-6

2.2686e-7

1.6285e-8

2.9037e-9

35.9

210

BHB

HHZ

1.2932e-6

1.5753e-7

6.8671e-8

2.4407e-8

9.9627e-9

2.4936e-6

2.5348e-7

1.4291e-8

3.1235e-9

44.8

360

BHB

HHN

1.1483e-6

1.2502e-7

6.0687e-8

2.8748e-8

1.9822e-8

1.6324e-6

2.6667e-7

2.8737e-8

3.0301e-9

44.8

360

BHB

HHE

1.0724e-6

1.2829e-7

6.7580e-8

2.9780e-8

1.0612e-8

1.4954e-6

2.2299e-7

1.4720e-8

2.7066e-9

44.8

360

GBOS

HHZ

1.2801e-6

2.0279e-7

1.5535e-7

4.3818e-8

2.1049e-8

3.9164e-6

7.1130e-7

3.2019e-8

4.8965e-9

52.6

116

GBOS

HHN

2.4890e-6

5.3683e-7

2.0941e-7

8.9476e-8

7.5122e-8

5.2041e-6

6.7832e-7

1.2784e-7

1.0610e-8

52.6

116

GBOS

HHE

1.4737e-6

2.4606e-7

1.7216e-7

4.8553e-8

2.1819e-8

3.9398e-6

7.2200e-7

3.3797e-8

5.7614e-9

52.6

116

TURF

HHZ

4.1458e-7

6.6288e-8

3.0596e-8

1.5849e-8

9.6448e-9

6.9581e-7

9.1870e-8

1.1557e-8

1.4912e-9

54.6

169

TURF

HHN

3.0809e-7

5.2414e-8

3.5351e-8

1.4075e-8

8.7523e-9

7.1905e-7

1.6288e-7

1.3320e-8

1.7217e-9

54.6

169

TURF

HHE

3.2216e-7

6.7666e-8

4.0271e-8

1.6569e-8

9.2565e-9

1.1568e-6

2.1246e-7

1.6323e-8

1.6671e-9

54.6

169

MGRO

HHZ

5.9022e-7

6.0813e-8

3.0092e-8

2.0546e-8

7.0214e-9

4.7906e-7

1.2103e-7

1.1423e-8

1.1034e-9

63.8

136

MGRO

HHN

5.2795e-7

6.0071e-8

3.7271e-8

2.5717e-8

9.4826e-9

9.2118e-7

1.6522e-7

1.5948e-8

1.5269e-9

63.8

136

MGRO

HHE

4.5590e-7

7.0568e-8

3.6037e-8

1.8776e-8

6.8469e-9

9.1267e-7

1.4520e-7

9.5000e-9

1.6296e-9

63.8

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): 0.3 2025-07-03 22:53:31 (UTC)

MANUAL Location - Area: Alpi Cozie , magnitude (M_L): 0.3
2025-07-03 22:53:31 (UTC)