RSNI - Manually revised location

MANUAL Location - Area: Francia , magnitude (M_L): 1.6
2025-07-27 08:32:39 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-07-28 08:58:03

Earthquake info - Manual location

Event - ID :	250727083200
Magnitude (M_L) :	1.6 +/- 0.2
Origin Time :	2025-07-27 08:32:39.889 (UTC)
Location :	Latitude: 45.255 N, Longitude: 5.895 E
Area :	Francia
Depth (km) :	12.36
Distances (km) :	66.3 --- Bardonecchia 75.7 --- Claviere 77.6 --- Oulx 78.1 --- Cesana Torinese 79.8 --- Sauze d Oulx 80.3 --- Salbertrand 83.0 --- Exilles 83.5 --- Sauze di Cesana 84.0 --- Sestriere 85.5 --- Moncenisio 86.3 --- Pragelato 86.9 --- Chiomonte 88.0 --- Venaus 88.1 --- Novalesa 88.7 --- Giaglione 89.4 --- Gravere 90.3 --- Mompantero 91.6 --- Susa 91.8 --- Usseaux 93.2 --- Meana di Susa

Quality location estimate: Erh: 1.8 km, Erz: 4.7 km, Nf: 24, Gap: 269 °, Rms: 0.29

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.
OGMO	FR	2025-07-27 08:32:51.475	0.080	3	0.02	1.67	2025-07-27 08:33:00.161	0.040	0	0.35	0.98	63.2
OGAG	FR	2025-07-27 08:32:53.590	0.035	1	0.07	1.62	2025-07-27 08:33:03.507	0.100	2	-0.11	1.39	73.8
RSL	FR	2025-07-27 08:32:52.330	0.036	1	-1.29	0.20	2025-07-27 08:33:00.650	0.209	6	-2.54	0.00	75.6
RRL	GU	2025-07-27 08:32:54.930	0.038	1	-0.11	1.55	2025-07-27 08:33:05.818	0.040	0	-0.27	1.13	80.8
LSD	GU	2025-07-27 08:32:57.515	0.020	0	-0.21	1.31	2025-07-27 08:33:10.393	0.040	0	0.03	1.34	100.5
MRGE	IV	2025-07-27 08:32:59.260	0.052	2	0.03	1.56	2025-07-27 08:33:12.205	0.348	7	-0.54	0.73	108.3
RSP	GU	2025-07-27 08:32:59.320	0.052	2	-0.01	1.57	2025-07-27 08:33:14.743	0.250	6	1.49	0.06	108.9
SURF	FR	2025-07-27 08:33:00.320	0.055	2	0.23	1.26	2025-07-27 08:33:14.830	0.331	7	-0.11	1.04	113.1
BHB	GU	2025-07-27 08:33:00.930	0.057	2	-0.14	1.41	2025-07-27 08:33:16.691	0.040	0	0.39	0.90	117.9
REMY	GU	2025-07-27 08:33:01.336	0.020	0	0.29	1.12	2025-07-27 08:33:16.270	0.040	0	0.38	0.91	118.6
DIX	CH	2025-07-27 08:33:06.080	0.073	3	-0.13	1.35	2025-07-27 08:33:24.119	0.040	0	-0.62	0.64	149.6

Local magnitude (M_L) calculation results

Station	Net	Channels	Stat. Mag.	Wood-And. Ampl.	Dist. (km)	Azimuth
OGAG	FR	HH	1.91	1.64e-1	73.8	135
RRL	GU	HH	1.46	3.20e-2	80.8	118
LSD	GU	HH	1.57	3.66e-2	100.5	76
MRGE	IV	HH	1.90	5.64e-2	108.3	57
RSP	GU	HH	1.51	2.81e-2	108.9	96
BHB	GU	HH	1.50	1.91e-2	117.9	113

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.
(°)

OGAG

HHZ

4.0888e-6

1.3036e-6

8.6303e-7

4.1285e-7

1.9193e-7

9.1041e-6

4.0895e-6

2.4516e-7

3.2238e-8

73.8

135

OGAG

HHN

4.6614e-6

1.6634e-6

1.2251e-6

5.9377e-7

3.1883e-7

1.0930e-5

7.1288e-6

4.0267e-7

4.7837e-8

73.8

135

OGAG

HHE

3.9915e-6

1.2201e-6

1.0372e-6

6.1824e-7

2.2818e-7

7.1649e-6

3.8969e-6

2.6708e-7

3.2517e-8

73.8

135

RRL

HHZ

7.1404e-7

1.7043e-7

1.5901e-7

1.5108e-7

9.7526e-8

2.4823e-6

7.5651e-7

1.1897e-7

7.0193e-9

80.8

118

RRL

HHN

1.0971e-6

2.6468e-7

2.7069e-7

1.7573e-7

6.6406e-8

2.5240e-6

1.6140e-6

1.0631e-7

7.6416e-9

80.8

118

RRL

HHE

8.2663e-7

2.4914e-7

2.8058e-7

1.5324e-7

5.2069e-8

2.6612e-6

1.0858e-6

8.3721e-8

7.0501e-9

80.8

118

LSD

HHZ

1.0124e-6

2.5187e-7

2.1271e-7

1.1316e-7

5.2454e-8

4.0768e-6

1.1047e-6

6.0606e-8

7.2749e-9

100.5

LSD

HHN

1.0635e-6

3.3941e-7

3.1627e-7

1.2933e-7

4.8363e-8

2.8234e-6

2.6102e-6

5.8694e-8

8.2365e-9

100.5

LSD

HHE

1.3080e-6

3.8145e-7

3.0786e-7

1.4226e-7

6.4035e-8

2.8895e-6

2.1431e-6

8.6175e-8

9.8836e-9

100.5

MRGE

HHZ

1.6010e-6

5.7338e-7

3.8815e-7

2.5728e-7

1.1746e-7

3.6099e-6

1.5160e-6

1.2884e-7

1.5084e-8

108.3

MRGE

HHN

2.0641e-6

5.2887e-7

3.5375e-7

1.3690e-7

8.5133e-8

7.0397e-6

2.1394e-6

1.3013e-7

1.4642e-8

108.3

MRGE

HHE

2.4522e-6

5.2548e-7

4.5626e-7

2.7590e-7

1.6134e-7

1.1212e-5

2.5958e-6

2.0371e-7

1.9205e-8

108.3

RSP

HHZ

1.2310e-6

2.3974e-7

1.5823e-7

7.5930e-8

2.8942e-8

2.4760e-6

8.7555e-7

3.4824e-8

5.4326e-9

108.9

RSP

HHN

1.1597e-6

2.4746e-7

1.6078e-7

7.3499e-8

4.2320e-8

2.0816e-6

9.1925e-7

5.4965e-8

4.7843e-9

108.9

RSP

HHE

1.0127e-6

2.2759e-7

2.3781e-7

8.4211e-8

3.6514e-8

3.6072e-6

1.5372e-6

5.1125e-8

7.1901e-9

108.9

BHB

HHZ

1.1939e-6

2.8592e-7

1.8309e-7

8.2987e-8

3.2078e-8

5.2693e-6

7.6295e-7

4.5522e-8

8.3045e-9

117.9

113

BHB

HHN

8.1881e-7

1.3493e-7

1.2666e-7

5.9415e-8

2.5272e-8

2.4488e-6

8.1983e-7

4.0043e-8

3.6548e-9

117.9

113

BHB

HHE

4.8628e-7

1.5088e-7

1.5003e-7

7.6629e-8

2.4448e-8

1.6080e-6

7.5750e-7

3.3938e-8

3.8929e-9

117.9

113

REMY

HHZ

1.6699e-6

5.9423e-7

5.5825e-7

2.7557e-7

1.4477e-7

3.9201e-6

5.1250e-6

1.8455e-7

1.8536e-8

118.6

REMY

HHN

3.5197e-6

7.2586e-7

5.3022e-7

4.0648e-7

2.1244e-7

6.8358e-6

1.8982e-6

2.4732e-7

2.1228e-8

118.6

REMY

HHE

2.9149e-6

7.7616e-7

6.3238e-7

3.9136e-7

1.9969e-7

6.1191e-6

5.7444e-6

2.6249e-7

2.8362e-8

118.6

DIX

HHZ

6.0823e-6

2.0599e-6

6.7411e-7

2.7248e-7

1.5839e-7

7.2622e-6

3.5216e-6

1.6660e-7

2.2982e-8

149.6

DIX

HHN

4.4189e-6

1.7051e-6

7.3843e-7

2.4399e-7

1.7904e-7

1.0313e-5

3.6771e-6

2.5889e-7

2.6117e-8

149.6

DIX

HHE

4.5006e-6

1.7937e-6

5.2431e-7

1.7985e-7

8.8185e-8

7.6468e-6

3.0274e-6

1.1544e-7

1.8831e-8

149.6

*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: Francia , magnitude (ML): 1.6 2025-07-27 08:32:39 (UTC)

MANUAL Location - Area: Francia , magnitude (M_L): 1.6
2025-07-27 08:32:39 (UTC)