RSNI - Manually revised location

MANUAL Location - Area: Alpi Pennine , magnitude (M_L): 0.1
2025-04-27 14:27:43 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-04-28 07:37:55

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Earthquake info - Manual location

Event - ID :	250427142720
Magnitude (M_L) :	0.1 +/- 0.2
Origin Time :	2025-04-27 14:27:43.601 (UTC)
Location :	Latitude: 46.058 N, Longitude: 7.891 E
Area :	Alpi Pennine
Depth (km) :	6.62
Distances (km) :	11.6 --- Macugnaga 16.7 --- Ceppo Morelli 17.3 --- Antrona Schieranco 18.9 --- Vanzone con San Carlo 20.5 --- Carcoforo 20.8 --- Rima San Giuseppe 21.2 --- Bannio Anzino 22.2 --- Calasca-Castiglione 22.9 --- Alagna Valsesia 23.4 --- Viganella 25.0 --- Bognanco 25.1 --- Seppiana 25.5 --- Riva Valdobbia 25.7 --- Rimasco 25.8 --- Gressoney-la-Trinite 26.4 --- Montescheno 27.8 --- Fobello 27.9 --- Rimella 28.4 --- Pallanzeno 28.5 --- Cervatto

Quality location estimate: Erh: 0.9 km, Erz: 0.8 km, Nf: 18, Gap: 87 °, Rms: 0.34

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.
MMK	CH	2025-04-27 14:27:46.380	0.050	2	0.56	1.07	2025-04-27 14:27:47.320	0.040	0	-0.01	1.95	10.5
EMBD	CH	2025-04-27 14:27:48.328	0.020	0	0.52	1.18	2025-04-27 14:27:50.596	0.040	0	-0.03	1.84	19.8
SATI	GU	2025-04-27 14:27:48.482	0.020	0	0.23	0.21	2025-04-27 14:27:50.699	0.040	0	-0.75	0.11	22.5
VANNI	CH	2025-04-27 14:27:50.093	0.020	0	0.92	0.20	2025-04-27 14:27:53.551	0.040	0	0.58	0.91	29.4
DIX	CH	2025-04-27 14:27:50.922	0.020	0	0.03	1.78	2025-04-27 14:27:55.749	0.040	0	-0.08	1.46	38.7
FIESA	CH	2025-04-27 14:27:52.180	0.020	0	0.04	1.72	2025-04-27 14:27:57.943	0.040	0	-0.19	0.93	46.1
CIRO	GU	2025-04-27 14:27:54.132	0.020	0	-0.11	1.34	2025-04-27 14:28:00.582	0.040	0	-0.96	0.11	57.2
SENIN	CH	2025-04-27 14:27:56.258	0.020	0	2.16	0.00	2025-04-27 14:28:02.266	0.040	0	0.89	0.36	57.4

Local magnitude (M_L) calculation results

Station	Net	Channels	Stat. Mag.	Wood-And. Ampl.	Dist. (km)	Azimuth
MMK	CH	HH	0.26	8.21e-2	10.5	97
EMBD	CH	HH	-0.38	1.11e-2	19.8	346
SATI	GU	HH	0.37	2.85e-2	22.5	185
VANNI	CH	HH	-0.07	1.10e-2	29.4	307
DIX	CH	HH	0.48	2.32e-2	38.7	274
FIESA	CH	HH	0.04	5.86e-3	46.1	22
CIRO	GU	HH	0.20	2.94e-3	57.2	206
SENIN	CH	HH	0.13	4.67e-3	57.4	307

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.
(°)

MMK

HHZ

1.2022e-5

1.4885e-6

3.2293e-7

9.8709e-8

6.2890e-8

1.6519e-5

1.1999e-6

1.2216e-7

2.9790e-8

10.5

MMK

HHN

2.1060e-5

2.0969e-6

5.8194e-7

2.0638e-7

1.2129e-7

2.6696e-5

2.5169e-6

2.2467e-7

4.7079e-8

10.5

MMK

HHE

2.6422e-5

1.9543e-6

3.9304e-7

1.1692e-7

7.1134e-8

2.2176e-5

1.3667e-6

1.6094e-7

4.1635e-8

10.5

EMBD

HHZ

1.2668e-6

1.3986e-7

8.4893e-8

3.9766e-8

1.7094e-8

2.4781e-6

4.2925e-7

2.5356e-8

3.4658e-9

19.8

346

EMBD

HHN

2.3950e-6

2.3232e-7

8.0939e-8

2.7298e-8

1.3223e-8

2.8367e-6

4.9961e-7

2.5036e-8

4.7347e-9

19.8

346

EMBD

HHE

1.8143e-6

2.0217e-7

8.1520e-8

2.2555e-8

1.3475e-8

3.1655e-6

3.2132e-7

2.0437e-8

3.8459e-9

19.8

346

SATI

HHZ

2.5631e-6

3.0665e-7

9.9053e-8

3.2123e-8

1.6427e-8

3.0547e-6

4.1985e-7

3.0811e-8

6.8090e-9

22.5

185

SATI

HHN

2.7886e-6

2.8025e-7

1.0178e-7

3.3268e-8

1.7725e-8

3.5147e-6

4.5006e-7

2.7203e-8

5.3862e-9

22.5

185

SATI

HHE

4.4240e-6

5.9459e-7

2.0013e-7

7.3445e-8

3.9114e-8

1.0598e-5

7.0902e-7

6.4627e-8

1.4442e-8

22.5

185

VANNI

HHZ

8.8095e-7

1.3353e-7

7.7837e-8

3.0483e-8

1.6723e-8

1.3993e-6

4.6198e-7

2.3967e-8

3.4999e-9

29.4

307

VANNI

HHN

1.0795e-6

1.2014e-7

8.7609e-8

3.6177e-8

1.8929e-8

1.8820e-6

5.1712e-7

3.0102e-8

3.5168e-9

29.4

307

VANNI

HHE

8.0946e-7

9.7714e-8

6.7305e-8

3.2633e-8

1.5482e-8

1.3712e-6

4.2820e-7

2.4024e-8

3.3060e-9

29.4

307

DIX

HHZ

4.5254e-6

4.0681e-7

1.4737e-7

4.5551e-8

2.3350e-8

8.5852e-6

4.5493e-7

4.4855e-8

9.0000e-9

38.7

274

DIX

HHN

7.2349e-6

5.9261e-7

2.2641e-7

5.6229e-8

2.7927e-8

7.8511e-6

1.0640e-6

5.2142e-8

1.3484e-8

38.7

274

DIX

HHE

2.7847e-6

4.3275e-7

1.9254e-7

6.9228e-8

4.8769e-8

3.8888e-6

9.6263e-7

7.2192e-8

1.0882e-8

38.7

274

FIESA

HHZ

4.8345e-7

5.5694e-8

3.1149e-8

2.9765e-8

2.3879e-8

8.6965e-7

1.5603e-7

3.6225e-8

2.1093e-9

46.1

FIESA

HHN

5.8684e-7

6.2760e-8

4.2834e-8

3.1025e-8

2.7860e-8

7.0212e-7

2.2122e-7

3.2412e-8

2.1876e-9

46.1

FIESA

HHE

5.0285e-7

8.5269e-8

3.6775e-8

2.9821e-8

2.5511e-8

7.6015e-7

2.0556e-7

3.0496e-8

3.5834e-9

46.1

CIRO

HHZ

5.4027e-7

5.9206e-8

2.0083e-8

7.5897e-9

4.8998e-9

6.5073e-7

8.9448e-8

7.2204e-9

9.7232e-10

57.2

206

CIRO

HHN

6.7353e-7

6.4432e-8

2.2462e-8

1.0822e-8

4.8123e-9

6.0431e-7

1.1247e-7

8.3218e-9

1.1631e-9

57.2

206

CIRO

HHE

8.1042e-7

6.7143e-8

2.1458e-8

8.1812e-9

4.7606e-9

1.0377e-6

1.2116e-7

7.6936e-9

1.2187e-9

57.2

206

SENIN

HHZ

3.8288e-7

7.3646e-8

4.0548e-8

2.5206e-8

1.5828e-8

8.2542e-7

2.0119e-7

1.9513e-8

1.8849e-9

57.4

307

SENIN

HHN

3.2573e-7

5.6123e-8

3.3596e-8

2.5936e-8

1.1955e-8

6.5718e-7

1.6089e-7

1.3197e-8

1.7209e-9

57.4

307

SENIN

HHE

3.0533e-7

3.3422e-8

2.4660e-8

1.9921e-8

1.0764e-8

5.6376e-7

1.2337e-7

1.2639e-8

1.3224e-9

57.4

307

*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): 0.1 2025-04-27 14:27:43 (UTC)

MANUAL Location - Area: Alpi Pennine , magnitude (M_L): 0.1
2025-04-27 14:27:43 (UTC)