RSNI - Manually revised location

MANUAL Location - Area: Alpi Pennine , magnitude (M_L): 0.6
2025-04-27 18:45:01 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-04-28 07:59:06

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Earthquake info - Manual location

Event - ID :	250427184346
Magnitude (M_L) :	0.6 +/- 0.2
Origin Time :	2025-04-27 18:45:01.707 (UTC)
Location :	Latitude: 45.891 N, Longitude: 6.988 E
Area :	Alpi Pennine
Depth (km) :	8.96
Distances (km) :	10.9 --- Courmayeur 14.0 --- Pre -Saint-Didier 15.2 --- Morgex 16.6 --- Saint-Rhemy-En-Bosses 17.2 --- La Salle 18.7 --- Saint-Oyen 19.4 --- La Thuile 20.2 --- Etroubles 23.3 --- Avise 23.7 --- Saint-Nicolas 23.7 --- Allein 24.9 --- Arvier 25.2 --- Ollomont 25.9 --- Doues 26.7 --- Gignod 26.9 --- Villeneuve 27.0 --- Introd 27.1 --- Valpelline 27.4 --- Saint-Pierre 27.7 --- Roisan

Quality location estimate: Erh: 1 km, Erz: 0.4 km, Nf: 26, Gap: 153 °, Rms: 0.45

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 18:45:04.550	0.008	0	0.03	1.83	2025-04-27 18:45:05.719	0.039	0	-0.66	1.24	13.2
BLANC	GU	2025-04-27 18:45:04.770	0.007	0	-0.02	1.86	2025-04-27 18:45:06.160	0.036	0	-0.71	1.34	14.0
MRGE	IV	2025-04-27 18:45:05.460	0.010	0	-0.06	1.51	2025-04-27 18:45:07.360	0.054	1	-0.71	1.29	18.0
RSL	FR	2025-04-27 18:45:08.860	0.020	1	0.00	1.78	2025-04-27 18:45:12.970	0.115	3	-0.75	1.04	37.1
DIX	CH	2025-04-27 18:45:09.823	0.020	0	0.08	1.48	2025-04-27 18:45:14.755	0.116	3	-0.53	0.79	40.1
LSD	GU	2025-04-27 18:45:10.990	0.046	2	0.09	1.34	2025-04-27 18:45:16.330	0.153	4	-0.85	0.87	50.5
CIRO	GU	2025-04-27 18:45:11.964	0.020	0	-0.43	0.38	2025-04-27 18:45:18.080	0.203	6	-1.78	0.15	56.4
SENIN	CH	2025-04-27 18:45:12.868	0.020	0	-0.06	1.35	2025-04-27 18:45:19.881	0.040	0	-0.89	0.82	58.8
SATI	GU	2025-04-27 18:45:16.281	0.020	0	2.05	0.00	2025-04-27 18:45:21.813	0.226	6	-1.59	0.25	69.2
EMBD	CH	2025-04-27 18:45:15.309	0.020	0	-0.02	1.35	2025-04-27 18:45:23.966	0.040	0	-0.81	0.89	75.2
LATO	IV	2025-04-27 18:45:15.193	0.020	0	0.06	1.34	2025-04-27 18:45:23.005	0.040	0	-1.17	0.47	75.8
MMK	CH	2025-04-27 18:45:15.806	0.020	0	0.23	0.66	2025-04-27 18:45:24.174	0.040	0	-1.16	0.49	78.3

Local magnitude (M_L) calculation results

Station	Net	Channels	Stat. Mag.	Wood-And. Ampl.	Dist. (km)	Azimuth
BLANC	GU	HH	1.04	5.54e-1	14.0	219
LSD	GU	HH	0.72	2.35e-2	50.5	167
CIRO	GU	HH	0.43	5.15e-3	56.4	125
SENIN	CH	HH	0.71	1.68e-2	58.8	24
SATI	GU	HH	0.43	3.59e-3	69.2	91
MMK	CH	HH	0.49	2.94e-3	78.3	76

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

2.4002e-4

2.3786e-5

7.4478e-6

1.9334e-6

1.0364e-6

4.4726e-4

3.1520e-5

2.1002e-6

5.2889e-7

13.2

194

COURM

HHN

3.7665e-4

3.9786e-5

9.9261e-6

3.3070e-6

2.1187e-6

5.6797e-4

3.6442e-5

4.1543e-6

9.4202e-7

13.2

194

COURM

HHE

1.9816e-4

2.9136e-5

1.0267e-5

3.0576e-6

1.9239e-6

5.7605e-4

4.5338e-5

3.2668e-6

6.9844e-7

13.2

194

BLANC

HHZ

6.0458e-5

6.6986e-6

2.4862e-6

7.2612e-7

3.3467e-7

9.9785e-5

1.1474e-5

6.1620e-7

1.4398e-7

14.0

219

BLANC

HHN

9.8226e-5

1.0332e-5

3.6716e-6

1.4857e-6

8.0070e-7

9.0688e-5

1.6846e-5

1.3127e-6

2.2677e-7

14.0

219

BLANC

HHE

8.6497e-5

9.4849e-6

4.5626e-6

1.5144e-6

7.5103e-7

1.2978e-4

2.4407e-5

1.2394e-6

2.2966e-7

14.0

219

MRGE

HHZ

3.4138e-5

3.0689e-6

6.3571e-7

1.8996e-7

1.1760e-7

2.2661e-5

3.1239e-6

2.1150e-7

4.9147e-8

18.0

157

MRGE

HHN

7.1849e-5

8.0036e-6

1.9920e-6

4.7027e-7

2.7596e-7

9.2165e-5

7.8754e-6

5.5066e-7

1.4251e-7

18.0

157

MRGE

HHE

7.9114e-5

7.7967e-6

2.4879e-6

7.7175e-7

4.0246e-7

1.0731e-4

1.0689e-5

7.1645e-7

1.4792e-7

18.0

157

DIX

HHZ

5.3305e-6

8.7893e-7

4.8455e-7

1.7838e-7

8.8940e-8

1.3010e-5

2.3926e-6

1.2099e-7

1.7566e-8

40.1

DIX

HHN

5.0541e-6

1.0952e-6

6.8656e-7

3.0882e-7

1.2240e-7

1.8599e-5

4.0487e-6

1.7839e-7

2.7392e-8

40.1

DIX

HHE

8.7689e-6

9.5423e-7

4.5067e-7

1.3426e-7

7.1487e-8

1.7333e-5

2.0280e-6

1.1390e-7

2.1268e-8

40.1

LSD

HHZ

2.0594e-6

2.1865e-7

8.8740e-8

3.0280e-8

1.5689e-8

3.0628e-6

2.1733e-7

2.4589e-8

4.1955e-9

50.5

167

LSD

HHN

2.4754e-6

2.6042e-7

7.5983e-8

2.1602e-8

1.3209e-8

4.1779e-6

3.3067e-7

2.5238e-8

5.5664e-9

50.5

167

LSD

HHE

2.7998e-6

3.9047e-7

1.6126e-7

4.7904e-8

2.9976e-8

7.1163e-6

6.4754e-7

5.2517e-8

1.0056e-8

50.5

167

CIRO

HHZ

6.6630e-7

7.8255e-8

2.6828e-8

1.0505e-8

6.0449e-9

1.1111e-6

1.7266e-7

1.0222e-8

1.5348e-9

56.4

125

CIRO

HHN

7.1945e-7

8.5528e-8

3.8935e-8

1.5731e-8

6.9386e-9

1.0393e-6

1.6020e-7

1.1623e-8

1.5503e-9

56.4

125

CIRO

HHE

7.1976e-7

7.8288e-8

2.7284e-8

9.6305e-9

4.9083e-9

1.1580e-6

1.5336e-7

6.9794e-9

1.7726e-9

56.4

125

SENIN

HHZ

1.3372e-6

2.1589e-7

1.2874e-7

4.1514e-8

2.1147e-8

2.8696e-6

5.1088e-7

2.7126e-8

5.9819e-9

58.8

SENIN

HHN

9.1062e-7

1.7518e-7

8.8050e-8

3.5203e-8

1.6501e-8

3.0677e-6

4.2547e-7

2.5000e-8

4.0962e-9

58.8

SENIN

HHE

1.1392e-6

2.2418e-7

1.5999e-7

5.3169e-8

2.6206e-8

3.7459e-6

8.1143e-7

4.5235e-8

6.7357e-9

58.8

SATI

HHZ

4.3449e-7

4.0766e-8

1.7586e-8

6.6575e-9

4.9977e-9

9.8034e-7

6.1670e-8

7.5125e-9

9.2635e-10

69.2

SATI

HHN

6.1375e-7

6.5216e-8

2.4486e-8

9.4954e-9

8.3329e-9

1.9325e-6

7.9725e-8

1.1528e-8

1.3607e-9

69.2

SATI

HHE

6.7414e-7

8.5131e-8

2.8899e-8

1.0664e-8

1.4286e-8

1.7445e-6

9.1228e-8

2.0279e-8

2.2983e-9

69.2

EMBD

HHZ

2.3050e-7

4.4461e-8

3.0909e-8

1.7867e-8

6.8485e-9

4.3904e-7

1.2528e-7

9.3776e-9

1.0626e-9

75.2

EMBD

HHN

1.9766e-7

3.4869e-8

2.5242e-8

1.2371e-8

5.8987e-9

5.3687e-7

1.2454e-7

7.4085e-9

8.8645e-10

75.2

EMBD

HHE

2.0042e-7

2.7346e-8

2.3136e-8

1.1137e-8

6.1699e-9

5.5567e-7

1.2280e-7

8.9577e-9

8.1980e-10

75.2

MMK

HHZ

2.3346e-7

3.7995e-8

1.9851e-8

7.8033e-9

8.5653e-9

7.6490e-7

8.1793e-8

1.1356e-8

1.0087e-9

78.3

MMK

HHN

2.4823e-7

3.6785e-8

3.1384e-8

1.3054e-8

1.0377e-8

9.5866e-7

1.1734e-7

1.6337e-8

1.0839e-9

78.3

MMK

HHE

2.3828e-7

3.1511e-8

1.7866e-8

6.9918e-9

5.5754e-9

5.3934e-7

1.0439e-7

7.5345e-9

8.3978e-10

78.3

*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): 0.6 2025-04-27 18:45:01 (UTC)

MANUAL Location - Area: Alpi Pennine , magnitude (M_L): 0.6
2025-04-27 18:45:01 (UTC)