RSNI - Manually revised location

MANUAL Location - Area: Alpi Pennine , magnitude (M_L): 1.0
2025-04-27 17:42:27 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-04-28 07:53:18

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20 km

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Earthquake info - Manual location

Event - ID :	250427174151
Magnitude (M_L) :	1.0 +/- 0.2
Origin Time :	2025-04-27 17:42:27.73 (UTC)
Location :	Latitude: 45.884 N, Longitude: 7.009 E
Area :	Alpi Pennine
Depth (km) :	6.01
Distances (km) :	10.5 --- Courmayeur 13.4 --- Pre -Saint-Didier 14.1 --- Morgex 14.8 --- Saint-Rhemy-En-Bosses 16.0 --- La Salle 17.0 --- Saint-Oyen 18.4 --- Etroubles 19.0 --- La Thuile 21.9 --- Avise 21.9 --- Allein 22.2 --- Saint-Nicolas 23.4 --- Arvier 23.5 --- Ollomont 24.1 --- Doues 24.9 --- Gignod 25.3 --- Valpelline 25.3 --- Villeneuve 25.5 --- Introd 25.7 --- Saint-Pierre 25.9 --- Roisan

Quality location estimate: Erh: 1.2 km, Erz: 0.9 km, Nf: 38, Gap: 149 °, Rms: 0.35

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 17:42:30.260	0.006	0	0.04	1.40	2025-04-27 17:42:31.430	0.030	0	-0.40	1.36	10.9
BLANC	GU	2025-04-27 17:42:30.470	0.006	0	-0.04	1.54	2025-04-27 17:42:31.870	0.029	0	-0.49	1.15	11.9
MRGE	IV	2025-04-27 17:42:31.160	0.009	0	0.02	1.52	2025-04-27 17:42:33.040	0.044	1	-0.37	1.33	15.4
RSL	FR	2025-04-27 17:42:34.590	0.019	0	-0.38	1.33	2025-04-27 17:42:38.520	0.112	3	-1.37	0.26	37.4
DIX	CH	2025-04-27 17:42:35.549	0.020	0	0.03	1.40	2025-04-27 17:42:40.395	0.115	3	-0.50	1.07	38.4
LSD	GU	2025-04-27 17:42:36.610	0.025	1	-0.06	1.44	2025-04-27 17:42:41.980	0.159	4	-0.80	0.57	48.9
CIRO	GU	2025-04-27 17:42:37.690	0.042	2	-0.38	1.29	2025-04-27 17:42:43.800	0.162	5	-1.49	0.21	54.2
SENIN	CH	2025-04-27 17:42:38.655	0.020	0	-0.22	1.24	2025-04-27 17:42:45.569	0.174	5	-1.10	0.38	58.3
VANNI	CH	2025-04-27 17:42:38.415	0.020	0	-0.16	1.29	2025-04-27 17:42:45.685	0.175	5	-0.37	1.17	58.5
SATI	GU	2025-04-27 17:42:39.456	0.020	0	-0.46	1.19	2025-04-27 17:42:47.972	0.040	0	-0.89	0.48	67.1
EMBD	CH	2025-04-27 17:42:41.026	0.020	0	-0.08	1.36	2025-04-27 17:42:49.432	0.234	6	-0.95	0.52	73.8
LATO	IV	2025-04-27 17:42:40.854	0.020	0	-0.02	1.33	2025-04-27 17:42:48.816	0.040	0	-0.90	0.48	74.0
MMK	CH	2025-04-27 17:42:41.150	0.039	1	-0.16	1.32	2025-04-27 17:42:50.839	0.229	6	-0.03	1.03	76.6
OGMO	FR	2025-04-27 17:42:41.735	0.020	0	-0.05	1.33	2025-04-27 17:42:50.500	0.316	7	-0.86	0.63	79.6
LAUCH	CH	2025-04-27 17:42:42.930	0.042	2	0.13	0.90	2025-04-27 17:42:53.318	0.040	0	0.01	1.06	83.7
FIESA	CH	2025-04-27 17:42:46.510	0.020	0	-0.05	1.25	2025-04-27 17:42:59.297	0.040	0	-0.36	1.10	104.9
RRL	GU	2025-04-27 17:42:46.290	0.055	2	-0.53	0.99	2025-04-27 17:42:59.100	0.326	7	-0.85	0.65	108.7
BHB	GU	2025-04-27 17:42:48.210	0.060	2	0.35	0.36	2025-04-27 17:43:01.820	0.355	7	0.01	0.82	118.4

Local magnitude (M_L) calculation results

Station	Net	Channels	Stat. Mag.	Wood-And. Ampl.	Dist. (km)	Azimuth
BLANC	GU	HH	0.97	6.21e-1	11.9	233
MRGE	IV	HH	1.18	5.51e-1	15.4	163
LSD	GU	HH	0.94	4.14e-2	48.9	168
CIRO	GU	HH	1.29	4.08e-2	54.2	126
SENIN	CH	HH	1.33	7.13e-2	58.3	23
VANNI	CH	HH	0.78	1.99e-2	58.5	51
SATI	GU	HH	1.04	1.56e-2	67.1	91
EMBD	CH	HH	0.62	8.33e-3	73.8	60
MMK	CH	HH	0.92	8.17e-3	76.6	76
LAUCH	CH	HH	1.14	2.07e-2	83.7	45
FIESA	CH	HH	1.24	1.56e-2	104.9	54
RRL	GU	HH	0.90	4.41e-3	108.7	189
BHB	GU	HH	1.09	7.43e-3	118.4	170

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

4.1307e-4

4.8744e-5

1.1590e-5

3.1797e-6

1.8878e-6

8.4981e-4

4.3925e-5

3.9231e-6

1.0503e-6

10.9

207

COURM

HHN

2.9791e-4

4.2140e-5

1.4544e-5

4.6012e-6

2.4461e-6

6.2172e-4

4.8350e-5

4.3921e-6

9.0988e-7

10.9

207

COURM

HHE

4.4606e-4

5.6717e-5

1.8161e-5

5.4019e-6

3.1583e-6

1.3618e-3

7.6749e-5

6.0418e-6

1.3239e-6

10.9

207

BLANC

HHZ

6.2633e-5

7.6524e-6

2.6594e-6

8.9064e-7

4.5478e-7

7.0039e-5

1.4163e-5

6.9414e-7

1.2543e-7

11.9

233

BLANC

HHN

9.6195e-5

1.1173e-5

4.9153e-6

1.9264e-6

9.7824e-7

1.6322e-4

1.9633e-5

1.6169e-6

2.9119e-7

11.9

233

BLANC

HHE

7.9847e-5

9.1881e-6

5.2839e-6

1.3255e-6

7.0036e-7

1.2455e-4

3.2582e-5

1.1000e-6

1.9680e-7

11.9

233

MRGE

HHZ

6.4570e-5

6.3168e-6

1.7140e-6

5.9189e-7

3.0398e-7

5.8593e-5

7.9242e-6

5.8471e-7

1.0437e-7

15.4

163

MRGE

HHN

1.8638e-4

1.5689e-5

3.7486e-6

9.7677e-7

6.0297e-7

1.7708e-4

1.7475e-5

1.0765e-6

2.8523e-7

15.4

163

MRGE

HHE

1.9864e-4

1.5735e-5

3.7363e-6

1.2084e-6

6.7301e-7

2.0731e-4

1.5458e-5

1.2263e-6

2.6782e-7

15.4

163

DIX

HHZ

2.2308e-5

3.5118e-6

1.9431e-6

7.4369e-7

3.2049e-7

5.2974e-5

1.1443e-5

4.2335e-7

8.2328e-8

38.4

DIX

HHN

2.1918e-5

3.0796e-6

1.8254e-6

4.7930e-7

2.4557e-7

5.2817e-5

9.7167e-6

3.5828e-7

6.2297e-8

38.4

DIX

HHE

3.2939e-5

4.7738e-6

2.4721e-6

8.4645e-7

4.5719e-7

7.1074e-5

1.4465e-5

7.0229e-7

1.0733e-7

38.4

LSD

HHZ

5.4581e-6

4.2779e-7

1.3479e-7

4.2973e-8

1.9828e-8

6.4288e-6

6.3079e-7

3.6325e-8

9.0483e-9

48.9

168

LSD

HHN

7.8102e-6

7.3994e-7

1.7272e-7

4.7136e-8

2.5182e-8

1.0916e-5

6.9354e-7

4.8423e-8

1.1902e-8

48.9

168

LSD

HHE

8.8798e-6

8.9485e-7

2.4661e-7

8.5027e-8

5.1912e-8

1.3251e-5

1.1138e-6

1.0014e-7

1.9972e-8

48.9

168

CIRO

HHZ

4.6840e-6

5.9783e-7

1.8218e-7

5.9615e-8

2.5117e-8

4.2799e-6

7.2144e-7

4.1705e-8

1.1065e-8

54.2

126

CIRO

HHN

7.6016e-6

9.8986e-7

3.2340e-7

1.1978e-7

5.8426e-8

8.2942e-6

1.7660e-6

8.9226e-8

1.4839e-8

54.2

126

CIRO

HHE

5.2118e-6

5.4112e-7

2.0942e-7

6.7901e-8

3.3642e-8

7.9163e-6

1.3154e-6

5.4801e-8

1.0435e-8

54.2

126

SENIN

HHZ

6.5826e-6

1.3994e-6

9.5093e-7

2.3142e-7

1.2908e-7

1.6811e-5

4.2890e-6

1.9882e-7

3.1998e-8

58.3

SENIN

HHN

4.9010e-6

6.4153e-7

3.8823e-7

1.3897e-7

7.1064e-8

1.3540e-5

1.7857e-6

1.0798e-7

1.7424e-8

58.3

SENIN

HHE

7.2972e-6

9.9693e-7

6.5045e-7

2.4170e-7

1.1857e-7

1.2214e-5

3.0765e-6

1.7737e-7

2.7693e-8

58.3

VANNI

HHZ

1.0421e-6

1.5869e-7

1.2856e-7

6.5954e-8

3.4928e-8

1.8580e-6

5.6128e-7

4.2467e-8

4.5093e-9

58.5

VANNI

HHN

1.2816e-6

2.2138e-7

1.8876e-7

1.1404e-7

4.1771e-8

2.3204e-6

9.0948e-7

5.4040e-8

6.6269e-9

58.5

VANNI

HHE

1.1080e-6

2.2658e-7

1.4899e-7

7.8532e-8

2.6374e-8

1.4994e-6

9.1539e-7

3.2171e-8

4.5391e-9

58.5

SATI

HHZ

1.2034e-6

1.3261e-7

6.3483e-8

1.8771e-8

8.6441e-9

2.9943e-6

2.3556e-7

1.4351e-8

2.7717e-9

67.1

SATI

HHN

2.5264e-6

2.6758e-7

7.9693e-8

2.3679e-8

1.1919e-8

4.7382e-6

3.4520e-7

2.1996e-8

5.1015e-9

67.1

SATI

HHE

2.6181e-6

3.2960e-7

1.1831e-7

2.9572e-8

2.2919e-8

5.7222e-6

3.5356e-7

3.3530e-8

6.4034e-9

67.1

EMBD

HHZ

5.9414e-7

9.7953e-8

7.7574e-8

3.9994e-8

1.6866e-8

1.1199e-6

4.9295e-7

2.3232e-8

2.3128e-9

73.8

EMBD

HHN

6.7550e-7

1.0335e-7

6.8054e-8

3.4496e-8

1.5190e-8

1.8110e-6

3.1041e-7

2.4017e-8

3.2334e-9

73.8

EMBD

HHE

7.4637e-7

9.6899e-8

6.7486e-8

5.4240e-8

3.2329e-8

1.6778e-6

3.3183e-7

5.5623e-8

3.9032e-9

73.8

MMK

HHZ

1.3564e-6

1.3710e-7

6.4850e-8

1.9223e-8

1.0727e-8

3.1103e-6

3.8196e-7

1.6106e-8

3.0017e-9

76.6

MMK

HHN

7.6532e-7

1.4627e-7

7.0269e-8

2.0396e-8

1.1516e-8

2.5592e-6

3.0884e-7

1.9179e-8

3.4845e-9

76.6

MMK

HHE

6.9181e-7

6.8971e-8

3.6853e-8

1.0605e-8

8.0069e-9

1.4389e-6

1.7697e-7

1.1439e-8

1.7475e-9

76.6

LAUCH

HHZ

6.2175e-7

1.2704e-7

8.0249e-8

2.5588e-8

1.1887e-8

2.4358e-6

3.2638e-7

1.8029e-8

3.0849e-9

83.7

LAUCH

HHN

1.8120e-6

3.0494e-7

1.4194e-7

3.1146e-8

1.8828e-8

5.5246e-6

4.8751e-7

3.0404e-8

7.1257e-9

83.7

LAUCH

HHE

1.6538e-6

2.9982e-7

1.9558e-7

5.6536e-8

2.5112e-8

5.4859e-6

7.2259e-7

3.7148e-8

7.5547e-9

83.7

FIESA

HHZ

9.6910e-7

1.4217e-7

1.3165e-7

6.7603e-8

3.5159e-8

2.7337e-6

8.1284e-7

4.4774e-8

4.7157e-9

104.9

FIESA

HHN

9.2006e-7

2.1228e-7

1.3886e-7

6.8711e-8

3.7841e-8

2.4668e-6

9.7127e-7

4.2843e-8

4.6707e-9

104.9

FIESA

HHE

1.2951e-6

1.9640e-7

1.4422e-7

7.0612e-8

4.0348e-8

3.2559e-6

9.3647e-7

5.5996e-8

6.6410e-9

104.9

RRL

HHZ

2.8750e-7

4.1974e-8

2.3266e-8

1.3942e-8

7.4434e-9

8.0385e-7

1.2966e-7

1.0347e-8

8.5673e-10

108.7

189

RRL

HHN

2.2818e-7

4.8821e-8

3.8072e-8

2.1245e-8

9.5827e-9

5.9603e-7

1.7569e-7

1.2297e-8

1.3333e-9

108.7

189

RRL

HHE

1.4879e-7

3.4756e-8

3.3818e-8

2.1618e-8

1.1443e-8

6.3289e-7

2.1086e-7

1.6891e-8

1.1654e-9

108.7

189

BHB

HHZ

7.1570e-7

1.0902e-7

5.1100e-8

2.1382e-8

1.9130e-8

2.1950e-6

1.8248e-7

4.4363e-8

2.8992e-9

118.4

170

BHB

HHN

6.0460e-7

8.7023e-8

5.4768e-8

1.8647e-8

1.3645e-8

1.3579e-6

2.5559e-7

2.7724e-8

1.9416e-9

118.4

170

BHB

HHE

3.7778e-7

6.4491e-8

4.2529e-8

2.8642e-8

4.9512e-8

1.0155e-6

1.5502e-7

1.2843e-7

5.0258e-9

118.4

170

*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 17:42:27 (UTC)

MANUAL Location - Area: Alpi Pennine , magnitude (M_L): 1.0
2025-04-27 17:42:27 (UTC)