RSNI - Manually revised location

MANUAL Location - Area: Riviera di ponente , magnitude (M_L): 0.6
2025-08-27 08:31:54 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-08-27 09:38:36

Earthquake info - Manual location

Event - ID :	250827083105
Magnitude (M_L) :	0.6 +/- 0.2
Origin Time :	2025-08-27 08:31:54.439 (UTC)
Location :	Latitude: 43.831 N, Longitude: 7.456 E
Area :	Riviera di ponente
Depth (km) :	12.73
Distances (km) :	7.3 --- Olivetta San Michele 9.1 --- Airole 13.0 --- Ventimiglia 13.5 --- Rocchetta Nervina 13.6 --- Dolceacqua 13.9 --- Camporosso 15.5 --- Vallecrosia 15.6 --- San Biagio della Cima 15.7 --- Isolabona 15.9 --- Soldano 17.0 --- Vallebona 17.2 --- Apricale 17.3 --- Bordighera 17.5 --- Perinaldo 19.1 --- Seborga 20.2 --- Pigna 20.7 --- Castel Vittorio 21.2 --- Ospedaletti 22.7 --- Baiardo 25.6 --- San Remo

Quality location estimate: Erh: 1 km, Erz: 0.8 km, Nf: 20, Gap: 146 °, Rms: 0.09

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.
ESCA	FR	2025-08-27 08:31:55.820	0.003	0	-1.70	0.00	2025-08-27 08:31:56.370	0.019	0	-3.39	0.00	14.8
BURY	GU	2025-08-27 08:31:57.880	0.013	0	-0.03	1.96	2025-08-27 08:32:00.523	0.056	1	0.05	1.78	16.0
TURF	FR	2025-08-27 08:31:58.710	0.011	0	-0.31	0.29	2025-08-27 08:32:02.255	0.138	4	-0.18	1.00	21.1
SAOF	FR	2025-08-27 08:31:59.549	0.020	0	0.02	2.05	2025-08-27 08:32:04.464	0.040	0	1.19	0.00	23.3
BIGN	GU	2025-08-27 08:31:59.590	0.020	0	-0.06	1.75	2025-08-27 08:32:05.210	0.040	0	1.73	0.00	26.9
MLIG	IV	2025-08-27 08:32:00.593	0.020	0	0.07	1.65	2025-08-27 08:32:05.742	0.040	0	0.72	0.00	28.3
MVIF	FR	2025-08-27 08:32:00.337	0.020	0	0.03	1.99	2025-08-27 08:32:03.460	0.040	0	-1.20	0.00	28.4
ENR	GU	2025-08-27 08:32:02.996	0.020	0	0.01	1.84	2025-08-27 08:32:09.127	0.040	0	0.19	0.87	46.5
STV	GU	2025-08-27 08:32:03.445	0.020	0	-0.06	1.63	2025-08-27 08:32:09.661	0.040	0	-0.16	1.08	49.1
ISO	FR	2025-08-27 08:32:04.106	0.020	0	0.17	0.87	2025-08-27 08:32:10.615	0.040	0	-0.10	1.25	52.7

Local magnitude (M_L) calculation results

Station	Net	Channels	Stat. Mag.	Wood-And. Ampl.	Dist. (km)	Azimuth
BURY	GU	HH	0.47	1.17e-1	16.0	124
TURF	FR	HH	0.44	6.60e-2	21.1	342
BIGN	GU	EH	0.57	5.69e-2	26.9	79
ENR	GU	HH	0.96	6.64e-2	46.5	356
ISO	FR	HH	0.35	9.14e-3	52.7	321

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.
(°)

ESCA

HHZ

7.2635e-5

1.7369e-5

1.1732e-5

5.9290e-6

3.3190e-6

2.1780e-4

7.4342e-5

4.5302e-6

4.7736e-7

14.8

270

ESCA

HHN

1.4082e-4

4.2960e-5

3.2537e-5

1.0251e-5

6.2370e-6

3.8295e-4

2.2284e-4

8.9737e-6

1.1008e-6

14.8

270

ESCA

HHE

1.1204e-4

3.4264e-5

2.6481e-5

1.8284e-5

8.2322e-6

3.7971e-4

1.2805e-4

9.5919e-6

9.2152e-7

14.8

270

BURY

HHZ

3.7820e-6

1.1541e-6

8.4857e-7

3.5594e-7

1.6270e-7

1.1466e-5

5.8336e-6

2.0592e-7

2.6804e-8

16.0

124

BURY

HHN

5.5016e-6

1.5919e-6

1.0933e-6

3.4216e-7

1.6896e-7

1.1805e-5

4.9746e-6

2.4948e-7

3.8122e-8

16.0

124

BURY

HHE

3.2352e-6

7.7613e-7

7.0425e-7

2.4828e-7

1.0864e-7

1.0920e-5

4.5724e-6

1.3088e-7

1.7975e-8

16.0

124

TURF

HHZ

1.1145e-6

3.6997e-7

3.4466e-7

1.7727e-7

9.9266e-8

3.1510e-6

1.6723e-6

1.3422e-7

1.1005e-8

21.1

342

TURF

HHN

1.8004e-6

5.8589e-7

6.1192e-7

2.7326e-7

1.6160e-7

4.4549e-6

3.8994e-6

2.1980e-7

1.8377e-8

21.1

342

TURF

HHE

2.1949e-6

6.7964e-7

5.6808e-7

3.6442e-7

2.0064e-7

3.9368e-6

3.6348e-6

2.0356e-7

2.0051e-8

21.1

342

SAOF

HHZ

3.9088e-7

1.5417e-7

1.6471e-7

1.1573e-7

4.4823e-8

8.5222e-7

1.1612e-6

4.8360e-8

4.7490e-9

23.3

SAOF

HHN

4.6729e-7

1.6164e-7

1.5192e-7

1.0130e-7

5.4786e-8

1.0285e-6

1.2339e-6

5.8901e-8

4.8188e-9

23.3

SAOF

HHE

4.6169e-7

1.3137e-7

1.3809e-7

1.2245e-7

5.9616e-8

1.0456e-6

6.4161e-7

7.2888e-8

5.5941e-9

23.3

BIGN

EHZ

1.5350e-6

2.5698e-7

2.2367e-7

2.3713e-7

1.4133e-7

1.8674e-6

9.1501e-7

1.9467e-7

1.3629e-8

26.9

BIGN

EHN

8.4729e-6

7.1769e-7

4.3944e-7

1.8160e-7

1.0189e-7

1.5296e-5

2.0850e-6

1.4010e-7

1.5582e-8

26.9

BIGN

EHE

5.5030e-6

6.7678e-7

3.5017e-7

2.9673e-7

1.9923e-7

1.0273e-5

1.5444e-6

2.0071e-7

2.1335e-8

26.9

ENR

HHZ

7.2559e-7

2.6037e-7

2.7646e-7

1.3041e-7

5.2714e-8

1.7108e-6

2.2840e-6

6.2130e-8

8.0911e-9

46.5

356

ENR

HHN

1.9791e-6

3.7105e-7

4.2599e-7

1.8973e-7

8.8882e-8

4.1583e-6

3.0231e-6

1.2580e-7

1.5626e-8

46.5

356

ENR

HHE

2.4470e-6

4.7008e-7

4.6118e-7

2.7112e-7

1.2201e-7

2.5429e-6

3.1452e-6

1.6443e-7

1.6305e-8

46.5

356

STV

HHZ

7.1067e-7

1.9227e-7

1.6279e-7

9.4964e-8

6.5689e-8

1.2147e-6

1.3026e-6

9.0747e-8

7.4054e-9

49.1

347

STV

HHN

7.7414e-7

2.4854e-7

2.1472e-7

7.6273e-8

3.5388e-8

1.2503e-6

1.6955e-6

4.7971e-8

6.5107e-9

49.1

347

STV

HHE

5.4392e-7

2.4699e-7

2.0727e-7

1.6223e-7

9.4841e-8

1.2436e-6

1.2654e-6

1.1017e-7

9.2229e-9

49.1

347

ISO

HHZ

2.1862e-7

5.5303e-8

5.2351e-8

4.2405e-8

1.4785e-8

5.8148e-7

3.3114e-7

1.5519e-8

1.7549e-9

52.7

321

ISO

HHN

2.9507e-7

7.9159e-8

5.9673e-8

4.3993e-8

1.7786e-8

7.2148e-7

3.2924e-7

2.0350e-8

2.2811e-9

52.7

321

ISO

HHE

1.6451e-7

6.0102e-8

4.8970e-8

5.5427e-8

2.2342e-8

5.5799e-7

1.6237e-7

2.3112e-8

2.1081e-9

52.7

321

*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: Riviera di ponente , magnitude (ML): 0.6 2025-08-27 08:31:54 (UTC)

MANUAL Location - Area: Riviera di ponente , magnitude (M_L): 0.6
2025-08-27 08:31:54 (UTC)