RSNI - Manually revised location

MANUAL Location - Area: Alpi Pennine , magnitude (M_L): 1.1
2025-04-28 17:18:45 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-04-29 07:14:18

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Earthquake info - Manual location

Event - ID :	250428171819
Magnitude (M_L) :	1.1 +/- 0.2
Origin Time :	2025-04-28 17:18:45.53 (UTC)
Location :	Latitude: 45.886 N, Longitude: 6.988 E
Area :	Alpi Pennine
Depth (km) :	8.91
Distances (km) :	10.4 --- Courmayeur 13.6 --- Pre -Saint-Didier 14.7 --- Morgex 16.4 --- Saint-Rhemy-En-Bosses 16.8 --- La Salle 18.6 --- Saint-Oyen 18.9 --- La Thuile 20.0 --- Etroubles 22.9 --- Avise 23.3 --- Saint-Nicolas 23.5 --- Allein 24.5 --- Arvier 25.2 --- Ollomont 25.7 --- Doues 26.5 --- Gignod 26.5 --- Villeneuve 26.6 --- Introd 26.9 --- Valpelline 27.0 --- Saint-Pierre 27.5 --- Roisan

Quality location estimate: Erh: 2 km, Erz: 1.4 km, Nf: 30, Gap: 153 °, Rms: 0.39

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	2025-04-28 17:18:48.330	0.005	0	0.05	1.80	2025-04-28 17:18:49.480	0.032	0	-0.62	1.17	12.9
BLANC	GU	2025-04-28 17:18:48.560	0.005	0	-0.01	1.96	2025-04-28 17:18:49.960	0.030	0	-0.66	1.17	13.8
MRGE	IV	2025-04-28 17:18:49.240	0.008	0	-0.03	1.84	2025-04-28 17:18:51.180	0.047	1	-0.60	1.08	17.6
RSL	FR	2025-04-28 17:18:52.646	0.020	0	0.01	1.84	2025-04-28 17:18:56.700	0.106	3	-0.76	0.85	36.8
DIX	CH	2025-04-28 17:18:53.530	0.048	2	-0.07	1.45	2025-04-28 17:18:58.445	0.125	3	-0.73	0.86	40.3
LSD	GU	2025-04-28 17:18:54.635	0.020	0	-0.01	1.71	2025-04-28 17:19:00.120	0.145	4	-0.75	0.82	50.0
CIRO	GU	2025-04-28 17:18:55.560	0.020	0	-0.62	1.04	2025-04-28 17:19:01.960	0.166	5	-1.64	0.17	56.1
SENIN	CH	2025-04-28 17:18:56.775	0.029	1	-0.04	1.49	2025-04-28 17:19:03.500	0.335	7	-1.21	0.43	59.2
VANNI	CH	2025-04-28 17:18:56.712	0.020	0	0.07	1.46	2025-04-28 17:19:03.427	0.040	0	-0.88	0.66	60.1
SATI	GU	2025-04-28 17:18:57.777	0.020	0	-0.27	0.63	2025-04-28 17:19:05.490	0.411	8	-1.73	0.19	69.2
EMBD	CH	2025-04-28 17:18:59.310	0.020	0	0.12	1.19	2025-04-28 17:19:07.509	0.040	0	-1.14	0.39	75.4
MMK	CH	2025-04-28 17:18:59.545	0.039	1	0.13	1.17	2025-04-28 17:19:08.382	0.240	6	-0.80	0.71	78.4
LAUCH	CH	2025-04-28 17:19:00.985	0.042	2	0.16	1.04	2025-04-28 17:19:12.120	0.303	7	0.63	0.26	85.0
FIESA	CH	2025-04-28 17:19:04.740	0.053	2	0.11	1.09	2025-04-28 17:19:17.371	0.040	0	-0.52	0.87	106.4

Local magnitude (M_L) calculation results

Station	Net	Channels	Stat. Mag.	Wood-And. Ampl.	Dist. (km)	Azimuth
BLANC	GU	HH	1.49	1.61e+0	13.8	222
LSD	GU	HH	1.18	6.95e-2	50.0	167
CIRO	GU	HH	0.85	1.36e-2	56.1	125
SENIN	CH	HH	1.24	5.56e-2	59.2	24
VANNI	CH	HH	0.83	2.11e-2	60.1	52
SATI	GU	HH	0.83	8.91e-3	69.2	91
MMK	CH	HH	0.99	9.15e-3	78.4	76
LAUCH	CH	HH	1.02	1.52e-2	85.0	45
FIESA	CH	HH	1.30	1.72e-2	106.4	54

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

5.7856e-4

6.1568e-5

2.2157e-5

6.0911e-6

3.3076e-6

1.0882e-3

9.9579e-5

5.5129e-6

1.0897e-6

12.9

195

COURM

HHN

8.0490e-4

8.8543e-5

2.7190e-5

8.6106e-6

5.6782e-6

1.4635e-3

9.2282e-5

1.0348e-5

2.0617e-6

12.9

195

COURM

HHE

4.6122e-4

7.5625e-5

2.9435e-5

9.2571e-6

5.8025e-6

1.4426e-3

1.3488e-4

9.4763e-6

1.8135e-6

12.9

195

BLANC

HHZ

1.2280e-4

1.4768e-5

7.4812e-6

2.1819e-6

1.0177e-6

2.5338e-4

3.7596e-5

1.6063e-6

3.1072e-7

13.8

222

BLANC

HHN

1.5888e-4

2.3297e-5

1.1081e-5

4.7283e-6

2.6080e-6

2.5015e-4

5.1027e-5

4.2243e-6

7.0141e-7

13.8

222

BLANC

HHE

1.9746e-4

2.4817e-5

1.4025e-5

5.0135e-6

2.4685e-6

3.5293e-4

7.7525e-5

3.7770e-6

6.2096e-7

13.8

222

MRGE

HHZ

5.8117e-5

5.7486e-6

1.7613e-6

5.6210e-7

3.0420e-7

5.8861e-5

9.0193e-6

4.7806e-7

1.1779e-7

17.6

156

MRGE

HHN

1.4653e-4

1.5003e-5

5.1048e-6

1.3181e-6

8.3973e-7

2.3303e-4

2.1128e-5

1.4037e-6

2.8941e-7

17.6

156

MRGE

HHE

1.2741e-4

1.8594e-5

6.6885e-6

2.2902e-6

1.1563e-6

2.4686e-4

2.9942e-5

1.8634e-6

3.9198e-7

17.6

156

DIX

HHZ

1.1510e-5

2.3058e-6

1.4499e-6

5.4209e-7

2.7030e-7

2.8811e-5

7.0498e-6

3.9365e-7

5.2946e-8

40.3

DIX

HHN

1.1572e-5

3.0972e-6

2.0017e-6

9.7210e-7

3.7692e-7

4.6402e-5

1.2215e-5

5.4237e-7

7.9433e-8

40.3

DIX

HHE

1.7071e-5

2.3960e-6

1.3693e-6

4.1952e-7

2.1899e-7

4.6206e-5

5.8736e-6

3.2726e-7

6.2434e-8

40.3

LSD

HHZ

3.6649e-6

4.7106e-7

2.6654e-7

9.6368e-8

5.0524e-8

8.0037e-6

6.9681e-7

7.3844e-8

1.0542e-8

50.0

167

LSD

HHN

4.8380e-6

6.0437e-7

2.2721e-7

5.9780e-8

3.6252e-8

1.0813e-5

9.0483e-7

6.1898e-8

1.1938e-8

50.0

167

LSD

HHE

7.4129e-6

1.2414e-6

4.9656e-7

1.4305e-7

9.1280e-8

1.9795e-5

2.0952e-6

1.4908e-7

2.7990e-8

50.0

167

CIRO

HHZ

1.2899e-6

1.6798e-7

7.9686e-8

3.3241e-8

1.7522e-8

2.9805e-6

4.9609e-7

2.7164e-8

3.8451e-9

56.1

125

CIRO

HHN

1.3787e-6

1.6866e-7

1.0572e-7

4.5916e-8

1.7328e-8

2.7681e-6

4.5897e-7

2.5029e-8

3.9227e-9

56.1

125

CIRO

HHE

1.2517e-6

1.5553e-7

7.6673e-8

2.6171e-8

1.1887e-8

2.9622e-6

4.1502e-7

1.5940e-8

3.2183e-9

56.1

125

SENIN

HHZ

3.2688e-6

5.7823e-7

3.8323e-7

1.0982e-7

6.5736e-8

7.0969e-6

1.5599e-6

8.8307e-8

1.5199e-8

59.2

SENIN

HHN

1.9945e-6

4.3122e-7

2.7301e-7

1.1635e-7

5.5726e-8

7.0327e-6

1.5683e-6

7.1088e-8

9.7031e-9

59.2

SENIN

HHE

3.3698e-6

7.5045e-7

5.1383e-7

1.7983e-7

9.1105e-8

8.7178e-6

2.7233e-6

1.3991e-7

2.2126e-8

59.2

VANNI

HHZ

6.4948e-7

1.0990e-7

1.1394e-7

5.1888e-8

1.9854e-8

1.4438e-6

5.8990e-7

2.4734e-8

2.9732e-9

60.1

VANNI

HHN

6.8545e-7

1.8332e-7

1.5420e-7

1.0638e-7

3.1046e-8

1.3323e-6

8.8932e-7

4.7753e-8

6.4759e-9

60.1

VANNI

HHE

5.5049e-7

1.3354e-7

1.3534e-7

9.9511e-8

3.6454e-8

1.6115e-6

6.7556e-7

4.4882e-8

5.3955e-9

60.1

SATI

HHZ

6.5042e-7

9.6674e-8

5.2203e-8

1.6063e-8

7.4594e-9

2.9407e-6

1.3258e-7

1.1623e-8

2.1951e-9

69.2

SATI

HHN

1.0814e-6

1.5653e-7

7.0653e-8

1.8843e-8

1.2781e-8

4.7865e-6

2.2686e-7

1.9516e-8

3.4995e-9

69.2

SATI

HHE

1.3669e-6

2.0448e-7

7.8230e-8

2.2031e-8

1.7790e-8

5.1584e-6

2.1676e-7

2.8155e-8

4.7501e-9

69.2

EMBD

HHZ

4.1731e-7

9.6512e-8

8.5281e-8

5.7848e-8

2.2593e-8

1.0424e-6

3.9148e-7

2.5705e-8

3.0527e-9

75.4

EMBD

HHN

3.9491e-7

8.7715e-8

6.5326e-8

3.5381e-8

1.4321e-8

1.2340e-6

3.2755e-7

1.8244e-8

2.4445e-9

75.4

EMBD

HHE

3.6945e-7

7.2283e-8

6.4681e-8

2.9146e-8

1.1456e-8

1.4607e-6

4.1274e-7

1.7045e-8

2.1935e-9

75.4

MMK

HHZ

5.8661e-7

1.0837e-7

6.3351e-8

2.2810e-8

1.2138e-8

1.9609e-6

2.8105e-7

1.9318e-8

2.6148e-9

78.4

MMK

HHN

5.7318e-7

1.0788e-7

8.8136e-8

2.4449e-8

1.3378e-8

2.4851e-6

4.6657e-7

1.7397e-8

2.9447e-9

78.4

MMK

HHE

5.1751e-7

7.5305e-8

5.3476e-8

1.6164e-8

9.0524e-9

1.3962e-6

3.5777e-7

1.2374e-8

2.0189e-9

78.4

LAUCH

HHZ

8.8132e-7

1.5190e-7

6.9159e-8

2.4725e-8

1.0176e-8

3.6012e-6

2.9977e-7

1.3778e-8

2.9684e-9

85.0

LAUCH

HHN

8.9217e-7

1.3252e-7

8.6728e-8

3.0079e-8

1.2477e-8

3.3227e-6

3.2034e-7

1.7409e-8

3.1019e-9

85.0

LAUCH

HHE

1.0275e-6

2.2397e-7

1.6723e-7

3.9669e-8

2.2216e-8

3.1036e-6

6.3643e-7

3.5105e-8

5.8362e-9

85.0

FIESA

HHZ

1.5896e-6

2.1579e-7

1.0220e-7

5.6434e-8

2.3408e-8

2.7205e-6

6.1670e-7

2.7512e-8

4.3519e-9

106.4

FIESA

HHN

1.0068e-6

1.8974e-7

1.2779e-7

6.2951e-8

3.5563e-8

2.1594e-6

6.7043e-7

4.6058e-8

4.6605e-9

106.4

FIESA

HHE

1.2915e-6

1.9933e-7

1.3321e-7

5.4419e-8

3.2781e-8

3.1575e-6

7.9467e-7

4.9910e-8

3.8546e-9

106.4

*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): 1.1 2025-04-28 17:18:45 (UTC)

MANUAL Location - Area: Alpi Pennine , magnitude (M_L): 1.1
2025-04-28 17:18:45 (UTC)