RSNI - Manually revised location

MANUAL Location - Area: Alpi Cozie , magnitude (M_L): 0.4
2026-06-01 23:23:26 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2026-06-03 08:31:57

Earthquake info - Manual location

Event - ID :	260601232301
Magnitude (M_L) :	0.4 +/- 0.2
Origin Time :	2026-06-01 23:23:26.631 (UTC)
Location :	Latitude: 44.617 N, Longitude: 7.218 E
Area :	Alpi Cozie
Depth (km) :	9.29
Distances (km) :	4.8 --- Sampeyre 6.6 --- Frassino 7.1 --- Oncino 8.6 --- Sanfront 8.9 --- Ostana 8.9 --- Paesana 9.9 --- Melle 10.3 --- Gambasca 10.4 --- Crissolo 11.0 --- Rifreddo 11.6 --- Martiniana Po 12.1 --- Casteldelfino 12.4 --- Brossasco 12.9 --- Valmala 13.2 --- Elva 13.3 --- Macra 13.3 --- Isasca 14.2 --- Stroppo 14.3 --- Envie 14.3 --- Revello

Quality location estimate: Erh: 0.9 km, Erz: 1.5 km, Nf: 20, Gap: 121 °, Rms: 0.22

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.
PZZ	GU	2026-06-01 23:23:30.530	0.010	0	0.35	1.00	2026-06-01 23:23:32.857	0.130	3	0.15	1.31	18.2
PONC	IV	2026-06-01 23:23:30.655	0.020	0	0.37	0.87	2026-06-01 23:23:32.820	0.040	0	-0.06	1.21	18.9
BHB	GU	2026-06-01 23:23:31.850	0.014	0	0.27	1.17	2026-06-01 23:23:34.990	0.086	2	0.06	1.34	26.4
VIND	IV	2026-06-01 23:23:33.404	0.060	2	0.25	1.21	2026-06-01 23:23:37.725	0.160	4	-0.01	1.14	35.5
SURF	FR	2026-06-01 23:23:33.620	0.019	0	-0.02	1.34	2026-06-01 23:23:38.298	0.111	3	-0.46	0.23	36.7
STV	GU	2026-06-01 23:23:34.535	0.100	4	0.21	1.26	2026-06-01 23:23:39.650	0.135	4	-0.03	1.12	43.4
ENR	GU	2026-06-01 23:23:34.909	0.080	3	0.00	1.29	2026-06-01 23:23:40.710	0.146	4	0.04	1.18	47.1
RRL	GU	2026-06-01 23:23:35.550	0.025	1	0.01	1.35	2026-06-01 23:23:41.220	0.147	4	-0.58	0.18	49.1
ISO	FR	2026-06-01 23:23:36.603	0.100	4	0.81	0.02	2026-06-01 23:23:42.350	0.228	6	0.25	0.97	51.0
RORO	GU	2026-06-01 23:23:41.660	0.045	2	0.12	1.30	2026-06-01 23:23:51.575	0.309	7	-0.41	0.49	88.2

Local magnitude (M_L) calculation results

Station	Net	Channels	Stat. Mag.	Wood-And. Ampl.	Dist. (km)	Azimuth
PZZ	GU	HH	0.32	1.13e-1	18.2	213
PONC	IV	HH	0.79	1.81e-1	18.9	274
BHB	GU	HH	0.17	2.14e-2	26.4	8
STV	GU	HH	0.44	1.13e-2	43.4	168
RRL	GU	HH	0.38	7.77e-3	49.1	315
RORO	GU	HH	0.44	3.71e-3	88.2	129

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.
(°)

PZZ

HHZ

1.8472e-5

1.7787e-6

9.0807e-7

2.1829e-7

1.0951e-7

2.1684e-5

5.9387e-6

1.9269e-7

4.0901e-8

18.2

213

PZZ

HHN

1.4649e-5

1.7915e-6

6.9314e-7

1.6864e-7

9.0509e-8

3.1511e-5

2.6410e-6

1.6779e-7

3.5569e-8

18.2

213

PZZ

HHE

1.5152e-5

1.5441e-6

9.5647e-7

2.6612e-7

1.4009e-7

1.7592e-5

5.3780e-6

2.2730e-7

4.0038e-8

18.2

213

PONC

HHZ

4.1248e-5

3.5347e-6

4.8693e-7

1.8026e-7

8.8249e-8

2.4994e-5

1.9903e-6

2.0697e-7

6.6116e-8

18.9

274

PONC

HHN

4.6528e-5

5.9926e-6

1.0886e-6

3.4019e-7

2.0492e-7

6.9803e-5

4.4452e-6

4.5597e-7

1.1422e-7

18.9

274

PONC

HHE

2.2288e-5

2.2853e-6

4.5869e-7

1.7101e-7

1.0467e-7

1.9165e-5

2.2581e-6

2.1487e-7

4.8232e-8

18.9

274

BHB

HHZ

3.9697e-6

4.1093e-7

1.1939e-7

3.0778e-8

1.9719e-8

8.2225e-6

4.5052e-7

3.5686e-8

8.0877e-9

26.4

BHB

HHN

3.2017e-6

2.9390e-7

9.6720e-8

3.6686e-8

2.9215e-8

4.2801e-6

3.6527e-7

4.1230e-8

7.2440e-9

26.4

BHB

HHE

4.3366e-6

5.6658e-7

1.2246e-7

4.0082e-8

2.1513e-8

9.5926e-6

4.5290e-7

4.7735e-8

1.0891e-8

26.4

STV

HHZ

1.4777e-6

1.3727e-7

7.0505e-8

1.7642e-8

1.0542e-8

2.8168e-6

2.6351e-7

1.7100e-8

2.9511e-9

43.4

168

STV

HHN

1.3904e-6

1.8252e-7

6.4761e-8

1.7732e-8

9.9912e-9

4.1070e-6

2.2854e-7

1.4837e-8

3.8354e-9

43.4

168

STV

HHE

2.2076e-6

2.4371e-7

1.0836e-7

2.5582e-8

1.4231e-8

3.5162e-6

5.5808e-7

2.4405e-8

4.3994e-9

43.4

168

ENR

HHZ

7.9339e-6

5.8816e-7

1.6573e-7

4.1688e-8

2.1797e-8

7.4133e-6

8.8360e-7

4.2278e-8

1.1387e-8

47.1

160

ENR

HHN

1.3374e-5

1.4544e-6

2.5867e-7

7.3270e-8

4.1280e-8

1.0564e-5

8.9122e-7

9.9239e-8

2.6733e-8

47.1

160

ENR

HHE

1.5963e-5

1.5519e-6

3.3984e-7

9.1652e-8

5.5939e-8

1.9307e-5

1.3006e-6

1.0976e-7

3.0754e-8

47.1

160

RRL

HHZ

8.2650e-7

9.9266e-8

4.2496e-8

2.7491e-8

1.4902e-8

1.3894e-6

1.7787e-7

2.2179e-8

3.1774e-9

49.1

315

RRL

HHN

7.6657e-7

1.3705e-7

6.7322e-8

1.7759e-8

1.1462e-8

3.0197e-6

2.7627e-7

1.4970e-8

2.8421e-9

49.1

315

RRL

HHE

7.5976e-7

1.0595e-7

5.9763e-8

1.9243e-8

1.0284e-8

2.3822e-6

2.3050e-7

1.4126e-8

2.8923e-9

49.1

315

ISO

HHZ

6.2954e-7

7.5540e-8

3.1777e-8

8.3310e-9

5.1463e-9

1.7277e-6

1.4071e-7

8.2197e-9

1.4263e-9

51.0

196

ISO

HHN

6.8615e-7

8.2141e-8

2.2158e-8

6.6279e-9

5.0793e-9

1.4335e-6

8.6870e-8

8.6918e-9

1.5702e-9

51.0

196

ISO

HHE

8.1212e-7

1.0188e-7

3.4248e-8

1.3230e-8

6.5725e-9

1.7536e-6

9.0728e-8

8.8588e-9

1.8147e-9

51.0

196

RORO

HHZ

4.0812e-7

4.7324e-8

2.1083e-8

8.8298e-9

9.0176e-9

8.5516e-7

1.0390e-7

1.6488e-8

1.1243e-9

88.2

129

RORO

HHN

5.7683e-7

6.6526e-8

3.1440e-8

1.0915e-8

7.1993e-9

7.4262e-7

1.2070e-7

1.0312e-8

1.3194e-9

88.2

129

RORO

HHE

5.1290e-7

6.5143e-8

3.2669e-8

1.0378e-8

7.1707e-9

8.1696e-7

1.3538e-7

1.4165e-8

1.5017e-9

88.2

129

*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 Cozie , magnitude (ML): 0.4 2026-06-01 23:23:26 (UTC)

MANUAL Location - Area: Alpi Cozie , magnitude (M_L): 0.4
2026-06-01 23:23:26 (UTC)