RSNI - Manually revised location

MANUAL Location - Area: Alpi Pennine , magnitude (M_L): 0.5
2025-09-12 19:09:53 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-09-15 07:45:21

Earthquake info - Manual location

Event - ID :	250912190835
Magnitude (M_L) :	0.5 +/- 0.2
Origin Time :	2025-09-12 19:09:53.139 (UTC)
Location :	Latitude: 45.901 N, Longitude: 7.006 E
Area :	Alpi Pennine
Depth (km) :	5.02
Distances (km) :	12.3 --- Courmayeur 15.3 --- Pre -Saint-Didier 16.0 --- Saint-Rhemy-En-Bosses 16.1 --- Morgex 17.9 --- La Salle 18.0 --- Saint-Oyen 19.4 --- Etroubles 20.8 --- La Thuile 22.9 --- Allein 23.7 --- Avise 23.9 --- Saint-Nicolas 24.1 --- Ollomont 24.9 --- Doues 25.2 --- Arvier 26.0 --- Gignod 26.1 --- Valpelline 27.0 --- Roisan 27.0 --- Villeneuve 27.2 --- Introd 27.3 --- Saint-Pierre

Quality location estimate: Erh: 1.4 km, Erz: 0.5 km, Nf: 24, Gap: 144 °, Rms: 0.43

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.
COURM	FR	2025-09-12 19:09:55.820	0.010	0	0.03	1.59	2025-09-12 19:09:56.844	0.062	1	-0.67	1.46	11.6
REMY	GU	2025-09-12 19:09:56.756	0.015	0	-0.02	1.61	2025-09-12 19:09:58.544	0.040	0	-0.66	1.48	15.5
MRGE	IV	2025-09-12 19:09:56.840	0.012	0	0.01	1.67	2025-09-12 19:09:58.778	0.100	2	-0.51	0.92	16.6
DIX	CH	2025-09-12 19:10:01.035	0.020	0	0.13	0.82	2025-09-12 19:10:05.523	0.040	0	-0.64	1.23	37.3
RSL	FR	2025-09-12 19:10:00.750	0.028	1	0.11	1.01	2025-09-12 19:10:04.944	0.100	2	-0.75	1.05	38.2
LSD	GU	2025-09-12 19:10:02.463	0.020	0	-0.05	1.29	2025-09-12 19:10:08.418	0.040	0	-0.46	0.85	50.6
CIRO	GU	2025-09-12 19:10:03.565	0.020	0	-0.22	0.52	2025-09-12 19:10:09.788	0.040	0	-1.41	0.13	55.3
SENIN	CH	2025-09-12 19:10:04.564	0.020	0	0.44	0.06	2025-09-12 19:10:11.112	0.040	0	-0.64	1.07	56.5
SATI	GU	2025-09-12 19:10:06.262	0.020	0	0.75	0.03	2025-09-12 19:10:13.777	0.040	0	-0.74	0.95	67.2
LATO	IV	2025-09-12 19:10:06.621	0.020	0	-0.07	1.10	2025-09-12 19:10:14.879	0.040	0	-0.91	0.65	75.8

Local magnitude (M_L) calculation results

Station	Net	Channels	Stat. Mag.	Wood-And. Ampl.	Dist. (km)	Azimuth
COURM	FR	HH	0.78	4.20e-1	11.6	200
REMY	GU	HH	0.05	4.66e-2	15.5	121
MRGE	IV	HH	0.45	8.95e-2	16.6	164
DIX	CH	HH	0.39	2.00e-2	37.3	57
LSD	GU	HH	0.23	7.63e-3	50.6	169
CIRO	GU	HH	0.50	6.24e-3	55.3	127
SENIN	CH	HH	0.82	2.35e-2	56.5	24
SATI	GU	HH	0.69	6.94e-3	67.2	92

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.
(°)

COURM

HHZ

5.1051e-5

7.8437e-6

3.3110e-6

9.1724e-7

4.8197e-7

1.3931e-4

1.4649e-5

7.8333e-7

1.7282e-7

11.6

200

COURM

HHN

4.7642e-5

7.1261e-6

4.1702e-6

1.8087e-6

6.7416e-7

1.5592e-4

1.8009e-5

8.9902e-7

1.6112e-7

11.6

200

COURM

HHE

4.7669e-5

6.4425e-6

2.9167e-6

8.0031e-7

4.0332e-7

1.2747e-4

1.6044e-5

6.1457e-7

1.3727e-7

11.6

200

REMY

HHZ

5.0538e-6

6.3914e-7

2.9928e-7

8.8983e-8

4.1744e-8

8.6736e-6

1.7690e-6

6.1239e-8

1.1007e-8

15.5

121

REMY

HHN

7.2593e-6

9.4543e-7

4.1077e-7

1.9771e-7

1.0063e-7

1.4453e-5

1.8340e-6

1.3247e-7

1.9300e-8

15.5

121

REMY

HHE

5.7024e-6

7.3554e-7

4.5368e-7

1.4819e-7

7.0031e-8

1.8019e-5

2.1273e-6

1.0446e-7

1.7240e-8

15.5

121

MRGE

HHZ

1.0119e-5

1.5177e-6

4.1344e-7

1.1188e-7

6.7582e-8

8.6229e-6

1.6904e-6

1.1215e-7

2.6327e-8

16.6

164

MRGE

HHN

1.6061e-5

2.2538e-6

6.0762e-7

1.9398e-7

1.0327e-7

3.4647e-5

4.0869e-6

1.5571e-7

4.3319e-8

16.6

164

MRGE

HHE

1.3929e-5

1.4366e-6

4.2548e-7

1.1644e-7

6.3520e-8

1.7854e-5

2.3925e-6

1.2271e-7

2.9106e-8

16.6

164

DIX

HHZ

3.0321e-6

3.8519e-7

1.6946e-7

6.1815e-8

2.9565e-8

6.3327e-6

8.1641e-7

4.9951e-8

9.8726e-9

37.3

DIX

HHN

2.5055e-6

3.5957e-7

1.6877e-7

5.6143e-8

3.1027e-8

5.0219e-6

8.0334e-7

5.5927e-8

7.4241e-9

37.3

DIX

HHE

2.5970e-6

4.3297e-7

1.9837e-7

5.4812e-8

3.2318e-8

6.2460e-6

9.9210e-7

5.1579e-8

9.8550e-9

37.3

LSD

HHZ

8.2933e-7

1.2069e-7

4.5319e-8

1.3950e-8

7.5584e-9

2.1147e-6

1.2764e-7

1.1855e-8

2.4348e-9

50.6

169

LSD

HHN

9.4419e-7

1.1883e-7

5.1107e-8

1.3998e-8

8.6310e-9

1.6861e-6

1.8699e-7

1.2594e-8

2.3211e-9

50.6

169

LSD

HHE

1.1622e-6

1.4669e-7

7.4096e-8

2.0846e-8

9.7393e-9

2.7126e-6

3.0869e-7

1.5956e-8

2.5836e-9

50.6

169

CIRO

HHZ

5.1364e-7

6.8056e-8

3.5551e-8

1.3291e-8

6.1759e-9

9.6241e-7

1.9811e-7

7.3388e-9

1.4519e-9

55.3

127

CIRO

HHN

9.3414e-7

9.6194e-8

5.4496e-8

2.3815e-8

8.6411e-9

1.6514e-6

2.4442e-7

1.2977e-8

2.2130e-9

55.3

127

CIRO

HHE

6.1344e-7

5.9667e-8

3.5926e-8

1.4817e-8

6.9746e-9

1.1388e-6

1.8466e-7

1.1237e-8

1.6601e-9

55.3

127

SENIN

HHZ

1.4220e-6

2.6477e-7

1.5290e-7

5.7150e-8

2.9792e-8

4.2431e-6

7.0783e-7

3.8790e-8

6.2408e-9

56.5

SENIN

HHN

1.1385e-6

2.2520e-7

1.5910e-7

9.8217e-8

7.0976e-8

3.7835e-6

8.9029e-7

1.0356e-7

1.8122e-8

56.5

SENIN

HHE

1.1278e-6

2.4290e-7

1.9181e-7

8.5494e-8

3.8874e-8

3.0763e-6

1.1467e-6

4.7750e-8

6.7568e-9

56.5

SATI

HHZ

3.5758e-7

5.8745e-8

2.7214e-8

1.4772e-8

1.5804e-8

1.6469e-6

7.5096e-8

2.5757e-8

3.6449e-9

67.2

SATI

HHN

8.9688e-7

1.2118e-7

4.1527e-8

1.1553e-8

7.7715e-9

3.2815e-6

1.1435e-7

1.3434e-8

2.5169e-9

67.2

SATI

HHE

7.8918e-7

1.3526e-7

5.0465e-8

1.8969e-8

3.2788e-8

4.4291e-6

1.1758e-7

5.6833e-8

4.6740e-9

67.2

*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 Pennine , magnitude (ML): 0.5 2025-09-12 19:09:53 (UTC)

MANUAL Location - Area: Alpi Pennine , magnitude (M_L): 0.5
2025-09-12 19:09:53 (UTC)