RSNI - Manually revised location

MANUAL Location - Area: Alpi Marittime , magnitude (M_L): 0.4
2024-12-28 11:33:56 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2024-12-30 09:39:18

Earthquake info - Manual location

Event - ID :	241228113222
Magnitude (M_L) :	0.4 +/- 0.2
Origin Time :	2024-12-28 11:33:56.837 (UTC)
Location :	Latitude: 44.079 N, Longitude: 7.208 E
Area :	Alpi Marittime
Depth (km) :	12.85
Distances (km) :	23.6 --- Entracque 25.8 --- Vinadio 26.2 --- Aisone 26.8 --- Valdieri 27.3 --- Demonte 29.0 --- Roaschia 30.6 --- Moiola 30.8 --- Sambuco 31.8 --- Valloriate 31.9 --- Vernante 32.4 --- Limone Piemonte 32.7 --- Pietraporzio 32.7 --- Gaiola 33.0 --- Olivetta San Michele 33.9 --- Rittana 34.1 --- Roccavione 34.2 --- Robilante 34.6 --- Roccasparvera 35.9 --- Airole 36.0 --- Borgo San Dalmazzo

Quality location estimate: Erh: 0.9 km, Erz: 1 km, Nf: 20, Gap: 120 °, Rms: 0.40

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.
ISO	FR	2024-12-28 11:34:01.710	0.010	0	0.75	0.64	2024-12-28 11:34:03.890	0.097	2	0.02	1.33	22.0
TURF	FR	2024-12-28 11:34:01.880	0.010	0	0.39	0.80	2024-12-28 11:34:04.823	0.064	1	-0.12	1.16	22.7
MVIF	FR	2024-12-28 11:34:02.340	0.011	0	0.55	0.83	2024-12-28 11:34:05.554	0.106	3	0.04	1.27	24.4
STV	GU	2024-12-28 11:34:02.060	0.011	0	0.49	1.02	2024-12-28 11:34:04.893	0.040	0	0.05	1.32	24.9
ENR	GU	2024-12-28 11:34:02.640	0.013	0	0.70	0.63	2024-12-28 11:34:05.890	0.116	3	0.40	0.95	27.5
SAOF	FR	2024-12-28 11:34:04.225	0.020	0	0.81	0.44	2024-12-28 11:34:08.125	0.040	0	0.02	1.33	32.4
PZZ	GU	2024-12-28 11:34:06.351	0.020	0	0.02	1.39	2024-12-28 11:34:12.735	0.040	0	-0.18	0.95	50.2
MGRO	GU	2024-12-28 11:34:06.397	0.020	0	-0.08	1.30	2024-12-28 11:34:13.369	0.040	0	0.14	1.11	50.2
GBOS	GU	2024-12-28 11:34:07.406	0.020	0	0.49	1.02	2024-12-28 11:34:14.152	0.040	0	0.42	0.97	55.3
SURF	FR	2024-12-28 11:34:06.923	0.020	0	-0.32	0.43	2024-12-28 11:34:14.340	0.040	0	-0.11	1.11	56.1

Local magnitude (M_L) calculation results

Station	Net	Channels	Stat. Mag.	Wood-And. Ampl.	Dist. (km)	Azimuth
STV	GU	HH	0.35	2.66e-2	24.9	27
ENR	GU	HH	0.61	8.31e-2	27.5	45
PZZ	GU	HH	0.44	2.10e-2	50.2	351
MGRO	GU	HH	0.03	4.88e-3	50.2	95
GBOS	GU	HH	0.54	6.60e-3	55.3	70

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.
(°)

ISO

HHZ

6.5201e-7

1.8566e-7

1.2956e-7

4.1352e-8

1.7029e-8

2.8571e-6

6.0956e-7

2.6403e-8

4.4703e-9

22.0

313

ISO

HHN

9.5040e-7

1.9301e-7

1.4441e-7

3.8555e-8

2.1093e-8

3.0980e-6

9.7853e-7

3.3777e-8

5.5702e-9

22.0

313

ISO

HHE

8.2151e-7

1.1081e-7

7.9432e-8

3.0024e-8

1.3903e-8

1.8381e-6

3.4599e-7

1.9409e-8

2.6942e-9

22.0

313

TURF

HHZ

5.2169e-7

1.0357e-7

9.0441e-8

5.9966e-8

3.2509e-8

1.4567e-6

6.7856e-7

4.5226e-8

3.0422e-9

22.7

128

TURF

HHN

5.4294e-7

1.0418e-7

9.9385e-8

6.1831e-8

3.2662e-8

1.9555e-6

4.8574e-7

4.1233e-8

3.4652e-9

22.7

128

TURF

HHE

4.4902e-7

7.7887e-8

7.3892e-8

4.8307e-8

2.9705e-8

1.4429e-6

5.0362e-7

3.6344e-8

2.5915e-9

22.7

128

STV

HHZ

9.7385e-7

1.4979e-7

1.3467e-7

6.6355e-8

2.6882e-8

2.7500e-6

7.5178e-7

3.2660e-8

4.1103e-9

24.9

STV

HHN

9.3950e-7

2.6371e-7

1.9423e-7

8.1533e-8

3.4423e-8

2.6727e-6

1.0392e-6

4.6170e-8

7.5615e-9

24.9

STV

HHE

9.0952e-7

2.2657e-7

2.0956e-7

1.2693e-7

4.1432e-8

3.2112e-6

1.3380e-6

6.2566e-8

6.7449e-9

24.9

ENR

HHZ

2.6896e-6

5.7679e-7

4.3390e-7

1.5633e-7

6.8610e-8

7.8474e-6

2.5317e-6

1.0496e-7

1.4750e-8

27.5

ENR

HHN

4.5398e-6

1.0805e-6

7.6587e-7

2.8291e-7

9.7704e-8

1.1576e-5

4.9386e-6

1.5414e-7

2.7300e-8

27.5

ENR

HHE

5.3486e-6

7.0722e-7

4.9931e-7

2.0450e-7

8.9588e-8

8.5649e-6

3.6983e-6

1.2414e-7

1.7634e-8

27.5

SAOF

HHZ

1.5839e-7

6.7154e-8

5.4245e-8

5.0345e-8

1.9281e-8

3.8227e-7

5.1877e-7

2.2296e-8

2.7277e-9

32.4

110

SAOF

HHN

1.9867e-7

4.4920e-8

4.4547e-8

3.5167e-8

1.6162e-8

3.8710e-7

3.0395e-7

1.5818e-8

1.4820e-9

32.4

110

SAOF

HHE

1.7998e-7

7.1502e-8

5.6221e-8

4.0458e-8

3.1499e-8

5.6118e-7

4.7368e-7

5.6726e-8

4.4978e-9

32.4

110

PZZ

HHZ

6.7107e-7

1.3917e-7

1.2811e-7

4.5124e-8

2.2999e-8

2.1442e-6

5.9264e-7

3.1059e-8

3.8047e-9

50.2

351

PZZ

HHN

7.0732e-7

1.5532e-7

1.2215e-7

8.4855e-8

3.2428e-8

2.1213e-6

5.6512e-7

3.6184e-8

4.4203e-9

50.2

351

PZZ

HHE

8.5122e-7

2.2551e-7

1.6747e-7

5.9124e-8

3.0455e-8

1.5045e-6

6.7682e-7

4.3946e-8

6.3898e-9

50.2

351

MGRO

HHZ

1.5546e-7

2.8171e-8

2.9055e-8

2.2054e-8

9.9985e-9

4.2056e-7

1.3066e-7

1.4046e-8

1.0422e-9

50.2

MGRO

HHN

1.7517e-7

4.6049e-8

4.2728e-8

3.4319e-8

1.5928e-8

7.9495e-7

2.4765e-7

1.9768e-8

1.7142e-9

50.2

MGRO

HHE

1.5511e-7

3.2913e-8

3.1438e-8

1.7142e-8

9.5159e-9

5.6425e-7

2.0254e-7

1.0084e-8

1.0862e-9

50.2

GBOS

HHZ

2.7260e-7

8.0770e-8

6.2114e-8

5.1563e-8

2.4192e-8

8.3319e-7

2.1179e-7

3.3459e-8

3.6236e-9

55.3

GBOS

HHN

3.2648e-7

7.8782e-8

6.0390e-8

3.0932e-8

1.5108e-8

7.7360e-7

2.6731e-7

1.9895e-8

2.3648e-9

55.3

GBOS

HHE

2.6865e-7

6.8656e-8

4.7654e-8

4.1464e-8

1.6608e-8

1.0684e-6

2.1990e-7

1.8016e-8

2.2838e-9

55.3

*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): 0.4 2024-12-28 11:33:56 (UTC)

MANUAL Location - Area: Alpi Marittime , magnitude (M_L): 0.4
2024-12-28 11:33:56 (UTC)