RSNI - Manually revised location

MANUAL Location - Area: Alpi Pennine , magnitude (M_L): 1.0
2025-04-27 18:42:37 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-04-28 07:56:21

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Earthquake info - Manual location

Event - ID :	250427184212
Magnitude (M_L) :	1.0 +/- 0.2
Origin Time :	2025-04-27 18:42:37.989 (UTC)
Location :	Latitude: 45.880 N, Longitude: 7.004 E
Area :	Alpi Pennine
Depth (km) :	6.01
Distances (km) :	9.9 --- Courmayeur 12.9 --- Pre -Saint-Didier 13.7 --- Morgex 15.0 --- Saint-Rhemy-En-Bosses 15.7 --- La Salle 17.2 --- Saint-Oyen 18.5 --- La Thuile 18.6 --- Etroubles 21.6 --- Avise 22.0 --- Saint-Nicolas 22.1 --- Allein 23.2 --- Arvier 23.8 --- Ollomont 24.4 --- Doues 25.1 --- Gignod 25.2 --- Villeneuve 25.3 --- Introd 25.6 --- Valpelline 25.6 --- Saint-Pierre 26.1 --- Roisan

Quality location estimate: Erh: 1.7 km, Erz: 1 km, Nf: 36, Gap: 149 °, Rms: 0.33

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	2025-04-27 18:42:40.780	0.006	0	0.39	1.25	2025-04-27 18:42:41.950	0.029	0	0.01	1.57	10.5
BLANC	GU	2025-04-27 18:42:41.000	0.005	0	0.31	1.37	2025-04-27 18:42:42.390	0.028	0	-0.10	1.28	11.5
MRGE	IV	2025-04-27 18:42:41.700	0.008	0	0.35	1.44	2025-04-27 18:42:43.600	0.044	1	0.01	1.56	15.1
RSL	FR	2025-04-27 18:42:45.110	0.023	1	-0.02	1.56	2025-04-27 18:42:49.110	0.112	3	-0.87	0.54	36.8
DIX	CH	2025-04-27 18:42:45.956	0.020	0	0.08	1.36	2025-04-27 18:42:50.742	0.115	3	-0.58	0.61	39.0
LSD	GU	2025-04-27 18:42:47.140	0.063	3	0.27	1.29	2025-04-27 18:42:52.380	0.150	4	-0.56	0.64	48.5
CIRO	GU	2025-04-27 18:42:48.280	0.028	1	-0.07	1.40	2025-04-27 18:42:54.330	0.162	5	-1.24	0.33	54.2
SENIN	CH	2025-04-27 18:42:49.225	0.030	1	-0.01	1.45	2025-04-27 18:42:56.244	0.209	6	-0.86	0.55	58.9
VANNI	CH	2025-04-27 18:42:49.354	0.020	0	0.42	1.03	2025-04-27 18:42:56.017	0.176	5	-0.47	0.73	59.1
SATI	GU	2025-04-27 18:42:50.642	0.020	0	0.41	1.06	2025-04-27 18:42:58.160	0.283	7	-1.07	0.44	67.5
LATO	IV	2025-04-27 18:42:51.386	0.020	0	0.29	1.27	2025-04-27 18:42:59.384	0.040	0	-0.53	0.66	73.8
EMBD	CH	2025-04-27 18:42:51.476	0.020	0	0.01	1.42	2025-04-27 18:43:00.056	0.040	0	-0.75	0.59	74.4
MMK	CH	2025-04-27 18:42:52.030	0.039	1	0.38	1.11	2025-04-27 18:43:00.769	0.311	7	-0.51	0.78	77.1
LAUCH	CH	2025-04-27 18:42:53.440	0.043	2	0.28	1.26	2025-04-27 18:43:03.535	0.251	7	-0.21	1.00	84.3
SIMPL	CH	2025-04-27 18:42:53.967	0.020	0	0.08	1.39	2025-04-27 18:43:04.002	0.040	0	-0.98	0.49	88.3
FIESA	CH	2025-04-27 18:42:57.195	0.053	2	0.27	1.22	2025-04-27 18:43:09.614	0.040	0	-0.47	0.78	105.5
RRL	GU	2025-04-27 18:42:56.820	0.054	2	-0.17	1.07	2025-04-27 18:43:08.581	0.040	0	-1.47	0.21	108.2

Local magnitude (M_L) calculation results

Station	Net	Channels	Stat. Mag.	Wood-And. Ampl.	Dist. (km)	Azimuth
BLANC	GU	HH	1.20	1.13e+0	11.5	234
MRGE	IV	HH	1.45	1.05e+0	15.1	160
LSD	GU	HH	1.09	5.92e-2	48.5	168
CIRO	GU	HH	1.08	2.52e-2	54.2	125
SENIN	CH	HH	1.09	4.01e-2	58.9	23
VANNI	CH	HH	0.83	2.18e-2	59.1	51
SATI	GU	HH	0.77	8.31e-3	67.5	90
EMBD	CH	HH	0.62	8.27e-3	74.4	59
MMK	CH	HH	0.91	7.97e-3	77.1	75
LAUCH	CH	HH	1.00	1.50e-2	84.3	45
FIESA	CH	HH	1.27	1.62e-2	105.5	54
RRL	GU	HH	0.83	3.79e-3	108.2	189

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

4.0809e-4

5.0586e-5

1.9215e-5

5.0359e-6

2.7738e-6

8.8639e-4

8.2511e-5

5.0717e-6

1.1382e-6

10.5

205

COURM

HHN

4.7903e-4

6.2458e-5

2.1336e-5

6.4345e-6

4.0295e-6

9.9153e-4

8.0972e-5

7.3853e-6

1.6032e-6

10.5

205

COURM

HHE

5.2912e-4

8.5366e-5

2.7232e-5

8.7181e-6

5.5275e-6

1.3588e-3

1.3337e-4

9.6207e-6

1.9427e-6

10.5

205

BLANC

HHZ

1.2179e-4

1.3371e-5

5.4497e-6

1.8118e-6

8.9825e-7

1.9000e-4

2.6384e-5

1.6416e-6

3.2834e-7

11.5

234

BLANC

HHN

1.1932e-4

1.3619e-5

7.3506e-6

2.8885e-6

1.5954e-6

1.7531e-4

3.5619e-5

2.5463e-6

4.0511e-7

11.5

234

BLANC

HHE

1.5592e-4

1.9434e-5

9.3024e-6

3.5356e-6

1.8344e-6

2.9531e-4

4.9375e-5

3.0487e-6

4.6842e-7

11.5

234

MRGE

HHZ

6.8957e-5

5.8644e-6

1.4775e-6

5.1195e-7

2.8557e-7

5.1378e-5

7.4212e-6

5.3631e-7

1.1064e-7

15.1

160

MRGE

HHN

1.8167e-4

1.8975e-5

5.1365e-6

1.3211e-6

7.6615e-7

2.4232e-4

2.1530e-5

1.4905e-6

4.1472e-7

15.1

160

MRGE

HHE

1.5988e-4

1.9513e-5

6.5932e-6

2.2592e-6

1.1546e-6

2.4395e-4

3.0329e-5

2.0341e-6

4.2199e-7

15.1

160

DIX

HHZ

2.0103e-5

2.5430e-6

1.3336e-6

3.3497e-7

1.9080e-7

3.4703e-5

4.6414e-6

3.0578e-7

5.8862e-8

39.0

DIX

HHN

1.6891e-5

3.2388e-6

1.9078e-6

8.9969e-7

3.5169e-7

5.9601e-5

1.1715e-5

4.9480e-7

8.6459e-8

39.0

DIX

HHE

3.0747e-5

3.0968e-6

1.5172e-6

4.8957e-7

2.4728e-7

6.4828e-5

5.2007e-6

4.0837e-7

7.5617e-8

39.0

LSD

HHZ

5.2864e-6

5.3877e-7

2.4743e-7

8.7174e-8

4.5859e-8

8.4508e-6

6.5077e-7

6.9449e-8

1.0988e-8

48.5

168

LSD

HHN

6.9569e-6

7.6380e-7

1.9771e-7

5.3777e-8

3.1726e-8

1.0337e-5

8.3776e-7

6.1375e-8

1.3625e-8

48.5

168

LSD

HHE

6.9366e-6

9.9500e-7

4.2489e-7

1.2567e-7

7.8372e-8

1.8122e-5

1.7502e-6

1.3530e-7

2.4544e-8

48.5

168

CIRO

HHZ

3.4419e-6

3.9004e-7

1.1705e-7

5.0638e-8

2.2398e-8

4.2287e-6

7.1176e-7

3.3354e-8

6.6000e-9

54.2

125

CIRO

HHN

4.3888e-6

5.6429e-7

1.8356e-7

7.8967e-8

3.5382e-8

5.3092e-6

9.3877e-7

5.3422e-8

8.0221e-9

54.2

125

CIRO

HHE

3.4385e-6

3.5115e-7

1.2346e-7

3.7116e-8

1.9517e-8

5.5852e-6

8.1442e-7

3.0737e-8

6.5244e-9

54.2

125

SENIN

HHZ

3.9164e-6

7.0295e-7

3.9196e-7

1.3994e-7

1.1521e-7

8.0367e-6

1.5850e-6

1.6153e-7

2.0815e-8

58.9

SENIN

HHN

2.5780e-6

3.6873e-7

2.4028e-7

1.1101e-7

6.2006e-8

9.4600e-6

1.1479e-6

8.1148e-8

1.9320e-8

58.9

SENIN

HHE

3.9527e-6

5.7481e-7

3.8929e-7

1.1678e-7

5.9784e-8

1.1930e-5

1.7649e-6

9.0603e-8

1.4394e-8

58.9

VANNI

HHZ

8.2913e-7

1.4256e-7

1.1743e-7

4.9417e-8

2.3145e-8

1.5106e-6

6.9390e-7

2.8883e-8

3.3095e-9

59.1

VANNI

HHN

8.8738e-7

1.7343e-7

1.6422e-7

1.0974e-7

3.1402e-8

1.3573e-6

9.4849e-7

4.6011e-8

6.1636e-9

59.1

VANNI

HHE

8.0348e-7

1.5829e-7

1.4314e-7

9.8135e-8

3.4723e-8

1.7501e-6

6.9845e-7

4.5430e-8

5.7946e-9

59.1

SATI

HHZ

1.0522e-6

1.0825e-7

3.8465e-8

1.3579e-8

6.8785e-9

2.0146e-6

1.4179e-7

1.0029e-8

2.0450e-9

67.5

SATI

HHN

1.6423e-6

1.8787e-7

5.4676e-8

1.6212e-8

9.5067e-9

3.7269e-6

1.8005e-7

1.7104e-8

3.4781e-9

67.5

SATI

HHE

1.5727e-6

1.9747e-7

6.7898e-8

1.8752e-8

1.4670e-8

4.3525e-6

1.8255e-7

2.2297e-8

4.2115e-9

67.5

EMBD

HHZ

6.0493e-7

9.5128e-8

7.9987e-8

5.1394e-8

1.8978e-8

1.1018e-6

4.3486e-7

2.3352e-8

2.8912e-9

74.4

EMBD

HHN

7.0050e-7

9.9642e-8

6.5071e-8

3.5906e-8

1.4145e-8

1.4785e-6

2.9098e-7

1.9315e-8

2.4506e-9

74.4

EMBD

HHE

6.3142e-7

8.9581e-8

6.2936e-8

3.2377e-8

1.3074e-8

1.1222e-6

3.4805e-7

1.7993e-8

2.4971e-9

74.4

MMK

HHZ

6.7215e-7

1.1813e-7

5.5783e-8

1.9746e-8

1.5379e-8

2.2344e-6

2.4749e-7

2.2264e-8

2.9289e-9

77.1

MMK

HHN

8.7745e-7

1.1487e-7

7.6102e-8

3.3238e-8

2.9238e-8

1.9447e-6

3.3183e-7

3.5448e-8

3.5761e-9

77.1

MMK

HHE

7.9237e-7

8.4737e-8

4.5828e-8

1.2069e-8

7.8456e-9

1.3329e-6

2.3147e-7

1.2212e-8

2.0985e-9

77.1

LAUCH

HHZ

1.1082e-6

1.2314e-7

6.5937e-8

2.5152e-8

1.1158e-8

3.2245e-6

2.8597e-7

1.4985e-8

2.8103e-9

84.3

LAUCH

HHN

7.8535e-7

1.3411e-7

9.0846e-8

2.9957e-8

1.5423e-8

2.6072e-6

3.7879e-7

2.3566e-8

3.7511e-9

84.3

LAUCH

HHE

8.8672e-7

1.9546e-7

1.6643e-7

4.2154e-8

1.9098e-8

3.1539e-6

6.2620e-7

2.6567e-8

5.1778e-9

84.3

SIMPL

HHZ

5.9424e-7

6.4205e-8

4.3970e-8

1.4543e-8

8.5456e-9

1.0035e-6

3.1699e-7

1.0814e-8

1.6355e-9

88.3

SIMPL

HHN

5.0006e-7

7.0140e-8

4.5790e-8

2.2045e-8

1.0314e-8

1.4130e-6

1.8640e-7

1.2050e-8

1.7361e-9

88.3

SIMPL

HHE

5.0007e-7

7.1717e-8

3.8017e-8

1.3114e-8

7.5643e-9

1.3912e-6

1.6960e-7

1.0234e-8

1.8717e-9

88.3

FIESA

HHZ

2.2845e-6

2.3777e-7

1.0547e-7

6.4804e-8

3.1257e-8

3.2018e-6

6.1907e-7

4.2334e-8

5.1096e-9

105.5

FIESA

HHN

1.4159e-6

1.8305e-7

1.2336e-7

5.8211e-8

3.6785e-8

1.8827e-6

5.9924e-7

4.5343e-8

4.6366e-9

105.5

FIESA

HHE

1.2384e-6

1.9089e-7

1.3896e-7

7.1774e-8

4.5985e-8

3.2328e-6

8.4502e-7

6.2077e-8

4.5474e-9

105.5

RRL

HHZ

4.0466e-7

6.3968e-8

2.4387e-8

9.0400e-9

6.3790e-9

1.0823e-6

1.0553e-7

9.0330e-9

9.0115e-10

108.2

189

RRL

HHN

2.6772e-7

5.5866e-8

3.9819e-8

1.4173e-8

7.5606e-9

7.0280e-7

2.4891e-7

1.0498e-8

1.3472e-9

108.2

189

RRL

HHE

1.6271e-7

4.0164e-8

3.3417e-8

1.8042e-8

8.0495e-9

5.9868e-7

2.0085e-7

1.1583e-8

9.4640e-10

108.2

189

*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): 1.0 2025-04-27 18:42:37 (UTC)

MANUAL Location - Area: Alpi Pennine , magnitude (M_L): 1.0
2025-04-27 18:42:37 (UTC)