RSNI - Manually revised location

MANUAL Location - Area: Alpi Marittime , magnitude (M_L): 0.0
2025-10-07 02:03:24 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-10-07 07:01:35

Earthquake info - Manual location

Event - ID :	251007020259
Magnitude (M_L) :	0.0 +/- 0.2
Origin Time :	2025-10-07 02:03:24.326 (UTC)
Location :	Latitude: 44.047 N, Longitude: 7.620 E
Area :	Alpi Marittime
Depth (km) :	14.02
Distances (km) :	11.1 --- Briga Alta 12.9 --- Pigna 13.1 --- Triora 13.7 --- Castel Vittorio 13.8 --- Molini di Triora 15.1 --- Mendatica 15.9 --- Montegrosso Pian Latte 17.2 --- Rocchetta Nervina 17.2 --- Cosio di Arroscia 17.5 --- Limone Piemonte 17.7 --- Baiardo 18.6 --- Apricale 18.6 --- Isolabona 20.0 --- Pornassio 20.1 --- Airole 20.1 --- Perinaldo 20.2 --- Olivetta San Michele 20.4 --- Rezzo 21.6 --- Dolceacqua 21.8 --- Carpasio

Quality location estimate: Erh: 0.5 km, Erz: 0.4 km, Nf: 20, Gap: 77 °, Rms: 0.19

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.
MLIG	IV	2025-10-07 02:03:26.950	0.020	0	-1.01	0.11	2025-10-07 02:03:28.309	0.040	0	-2.33	0.01	16.3
SAOF	FR	2025-10-07 02:03:27.770	0.006	0	0.03	1.95	2025-10-07 02:03:29.050	0.223	6	-1.18	0.12	16.9
MGRO	GU	2025-10-07 02:03:28.190	0.007	0	-0.59	0.03	2025-10-07 02:03:30.142	0.100	2	-1.93	0.01	21.7
TURF	FR	2025-10-07 02:03:30.040	0.017	0	0.71	0.04	2025-10-07 02:03:32.869	0.072	2	-0.05	1.79	24.3
ENR	GU	2025-10-07 02:03:30.083	0.020	0	0.27	0.77	2025-10-07 02:03:33.552	0.040	0	-0.07	1.81	30.0
IMI	GU	2025-10-07 02:03:29.957	0.020	0	-0.00	2.07	2025-10-07 02:03:33.977	0.100	2	-0.10	1.53	30.4
GBOS	GU	2025-10-07 02:03:30.299	0.020	0	0.09	1.34	2025-10-07 02:03:34.149	0.040	0	-0.07	1.76	31.6
STV	GU	2025-10-07 02:03:31.134	0.020	0	0.38	0.59	2025-10-07 02:03:35.010	0.193	5	-0.15	1.18	35.5
RORO	GU	2025-10-07 02:03:31.796	0.020	0	0.30	0.82	2025-10-07 02:03:36.449	0.040	0	-0.10	1.59	39.1
MVIF	FR	2025-10-07 02:03:32.638	0.020	0	-0.08	1.78	2025-10-07 02:03:39.162	0.100	2	0.39	0.72	43.3

Local magnitude (M_L) calculation results

Station	Net	Channels	Stat. Mag.	Wood-And. Ampl.	Dist. (km)	Azimuth
SAOF	FR	HH	-0.06	3.15e-2	16.9	218
MGRO	GU	HH	-0.08	1.90e-2	21.7	92
TURF	FR	HH	-0.36	8.06e-3	24.3	246
ENR	GU	HH	0.01	1.76e-2	30.0	322
IMI	GU	HH	0.07	1.92e-2	30.4	125
GBOS	GU	HH	0.41	1.49e-2	31.6	39
STV	GU	HH	0.10	7.59e-3	35.5	313
RORO	GU	HH	-0.09	6.10e-3	39.1	78

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.
(°)

SAOF

HHZ

9.4291e-7

2.2636e-7

2.0878e-7

1.3656e-7

4.7856e-8

3.1686e-6

1.0014e-6

5.6996e-8

6.9306e-9

16.9

218

SAOF

HHN

1.6516e-6

3.3437e-7

2.5644e-7

2.0400e-7

7.4523e-8

4.6456e-6

1.5600e-6

9.2158e-8

9.4787e-9

16.9

218

SAOF

HHE

1.5298e-6

2.8600e-7

2.2883e-7

1.7896e-7

7.4350e-8

4.5063e-6

1.4005e-6

8.5040e-8

7.7099e-9

16.9

218

MGRO

HHZ

6.7143e-7

1.7339e-7

1.3446e-7

6.0394e-8

2.5552e-8

1.4287e-6

9.3687e-7

3.4603e-8

4.4680e-9

21.7

MGRO

HHN

1.2735e-6

1.8381e-7

1.2855e-7

7.4338e-8

3.6593e-8

3.2324e-6

1.0643e-6

4.6376e-8

4.2614e-9

21.7

MGRO

HHE

1.1868e-6

2.1108e-7

1.4343e-7

4.6040e-8

2.7882e-8

2.1818e-6

7.7043e-7

4.1021e-8

7.5764e-9

21.7

TURF

HHZ

4.2285e-7

7.1343e-8

3.8147e-8

2.4057e-8

1.3132e-8

1.1154e-6

1.9757e-7

1.7080e-8

2.2625e-9

24.3

246

TURF

HHN

8.1578e-7

1.4450e-7

6.4809e-8

2.1265e-8

1.6474e-8

3.6789e-6

3.7106e-7

2.4718e-8

4.3036e-9

24.3

246

TURF

HHE

7.4414e-7

1.1128e-7

6.8249e-8

2.2959e-8

1.7092e-8

1.9571e-6

3.9638e-7

2.7638e-8

3.3676e-9

24.3

246

ENR

HHZ

1.3300e-6

1.8907e-7

1.0684e-7

3.4738e-8

2.2641e-8

2.6252e-6

3.9382e-7

3.2279e-8

4.5083e-9

30.0

322

ENR

HHN

2.8099e-6

2.7116e-7

1.4968e-7

5.3613e-8

3.0458e-8

4.7663e-6

4.7814e-7

4.6719e-8

6.3090e-9

30.0

322

ENR

HHE

2.5779e-6

2.3057e-7

1.2382e-7

4.1057e-8

1.9380e-8

3.3889e-6

4.1516e-7

2.9272e-8

5.8196e-9

30.0

322

IMI

HHZ

5.3558e-7

7.6373e-8

6.8731e-8

4.9936e-8

2.7200e-8

1.6538e-6

3.1541e-7

3.6095e-8

2.5330e-9

30.4

125

IMI

HHN

1.5923e-6

1.9954e-7

1.5083e-7

6.7976e-8

4.5270e-8

3.1896e-6

7.2328e-7

7.2089e-8

6.2381e-9

30.4

125

IMI

HHE

8.9647e-7

1.4820e-7

1.1744e-7

5.6774e-8

2.9398e-8

2.2454e-6

6.5507e-7

4.3201e-8

5.1924e-9

30.4

125

GBOS

HHZ

3.0124e-7

5.5656e-8

4.3393e-8

2.1671e-8

1.0444e-8

8.9308e-7

1.7110e-7

1.7316e-8

1.7919e-9

31.6

GBOS

HHN

2.0336e-6

3.8002e-7

1.1234e-7

4.5516e-8

2.0701e-8

3.7936e-6

4.9626e-7

3.6622e-8

7.7217e-9

31.6

GBOS

HHE

3.1514e-7

5.4969e-8

4.5217e-8

2.5528e-8

1.3433e-8

7.3138e-7

2.1039e-7

1.7300e-8

1.4464e-9

31.6

STV

HHZ

5.1134e-7

8.6621e-8

6.8367e-8

1.9739e-8

1.0169e-8

1.5006e-6

3.3218e-7

1.5387e-8

2.4183e-9

35.5

313

STV

HHN

5.1436e-7

6.2805e-8

4.1506e-8

1.3787e-8

7.4923e-9

1.0600e-6

1.8582e-7

1.0384e-8

1.6929e-9

35.5

313

STV

HHE

6.3640e-7

9.5108e-8

7.6572e-8

1.8802e-8

9.7873e-9

1.6661e-6

4.2434e-7

1.2790e-8

2.5128e-9

35.5

313

RORO

HHZ

3.2042e-7

5.3823e-8

3.1454e-8

1.3327e-8

9.1397e-9

8.8529e-7

1.4302e-7

1.3353e-8

1.4392e-9

39.1

RORO

HHN

5.7478e-7

9.6516e-8

5.6920e-8

2.1731e-8

1.1777e-8

9.8528e-7

2.1000e-7

1.6648e-8

2.4933e-9

39.1

RORO

HHE

4.0170e-7

6.3769e-8

4.2000e-8

1.6173e-8

9.7258e-9

1.0511e-6

2.1015e-7

1.3074e-8

1.3530e-9

39.1

*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 Marittime , magnitude (ML): 0.0 2025-10-07 02:03:24 (UTC)

MANUAL Location - Area: Alpi Marittime , magnitude (M_L): 0.0
2025-10-07 02:03:24 (UTC)