MANUAL Location - Area: Zona Bologna , magnitude (ML): 2.8
2020-07-04 04:58:29 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2020-07-06 09:09:09

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Earthquake info - Manual location
Event - ID :200704045815
Magnitude (ML) :2.8 +/- 0.3
Origin Time :2020-07-04 04:58:29.708 (UTC)
Location : Latitude: 44.266 N, Longitude: 11.694 E
Area :Zona Bologna
Depth (km) :18.78
Distances (km) : 2.6 --- Riolo Terme
7.1 --- Casalfiumanese
7.2 --- Casola Valsenio
8.0 --- Brisighella
8.6 --- Borgo Tossignano
10.0 --- Imola
10.3 --- Castel Bolognese
10.7 --- Fontanelice
11.7 --- Dozza
14.3 --- Modigliana
15.1 --- Faenza
16.1 --- Solarolo
16.2 --- Castel del Rio
16.9 --- Castel San Pietro Terme
17.3 --- Bagnara di Romagna
17.4 --- Mordano
18.6 --- Castel Guelfo di Bologna
20.5 --- Palazzuolo sul Senio
21.0 --- Tredozio
22.0 --- Marradi

Quality location estimate: Erh: 1 km, Erz: 0.8 km, Nf: 34, Gap: 151 °, Rms: 0.23


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.
IMOLIV2020-07-04 04:58:34.3100.0150-0.011.862020-07-04 04:58:38.0800.06610.011.8021.8
LMDIV2020-07-04 04:58:35.5100.01400.091.742020-07-04 04:58:39.8750.0892-0.171.2128.2
MTRZIV2020-07-04 04:58:35.5800.01400.171.412020-07-04 04:58:40.4300.08820.311.0629.3
SEIIV2020-07-04 04:58:37.1600.0241-0.051.732020-07-04 04:58:43.3890.12230.011.5740.6
RUFIIV2020-07-04 04:58:39.7100.0261-0.011.792020-07-04 04:58:47.8440.35470.181.1053.3
ASQUIV2020-07-04 04:58:40.5600.02810.420.772020-07-04 04:58:49.0100.16850.400.9656.3
RAVAIV2020-07-04 04:58:45.8100.03610.041.632020-07-04 04:58:57.5100.3988-0.640.5673.4
POPMGU2020-07-04 04:58:44.1800.0401-0.280.852020-07-04 04:58:55.8200.24460.151.1881.0
SERMIV2020-07-04 04:58:46.8800.0452-1.160.202020-07-04 04:59:00.4800.5179-1.640.1490.4
CSNTIV2020-07-04 04:58:47.8300.04820.550.622020-07-04 04:58:59.1660.0400-0.990.2495.8
CARDGU2020-07-04 04:58:47.8710.1004-0.091.382020-07-04 04:59:03.7560.20052.280.00102.1
SARMGU2020-07-04 04:58:48.4210.1004-0.460.532020-07-04 04:59:03.0540.2005-0.041.12105.3
MAIMGU2020-07-04 04:58:48.5600.05720.091.532020-07-04 04:59:02.8020.20050.460.85105.4
VLCMN2020-07-04 04:58:48.9090.0803-0.021.492020-07-04 04:59:03.1950.25060.041.10106.6
PIIIV2020-07-04 04:58:49.6300.0613-0.021.492020-07-04 04:59:03.0220.2005-1.510.14112.9
EQUIGU2020-07-04 04:58:52.9730.08031.310.002020-07-04 04:59:08.7890.20051.070.24124.7
GRAMGU2020-07-04 04:58:54.5900.06630.381.012020-07-04 04:59:11.3730.2005-0.980.32133.2
PLMAGU2020-07-04 04:58:55.4030.10040.780.362020-07-04 04:59:14.5220.25061.560.00149.9


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
MTRZ IVHH3.091.59e+129.3284
SEI IVHH3.341.51e+140.6229
CARD GUHH2.654.20e-1102.1255
SARM GUEH2.573.96e-1105.3265
MAIM GUHH2.552.77e-1105.4248
PII IVHH2.552.64e-1112.9237
GRAM GUHH2.785.38e-1133.2282
PLMA GUHH2.762.00e-1149.9261


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.
(°)
MTRZ IVHHZ1.2557e-46.1288e-55.0561e-54.2009e-52.2101e-52.8710e-43.6599e-42.6581e-52.3481e-629.3284
MTRZ IVHHN1.9157e-46.6009e-57.7198e-54.6510e-51.7248e-55.9898e-44.6397e-42.1108e-52.1424e-629.3284
MTRZ IVHHE3.3794e-41.3745e-41.1700e-48.0178e-53.0162e-58.8958e-45.4891e-43.9453e-54.1096e-629.3284
SEI IVHHZ1.7974e-46.8945e-57.2739e-53.5430e-51.5260e-52.7556e-45.9922e-42.0765e-52.3479e-640.6229
SEI IVHHN3.7765e-41.4761e-41.2142e-45.9012e-52.3759e-56.0869e-46.5100e-43.1374e-55.0356e-640.6229
SEI IVHHE1.3589e-45.5522e-55.4392e-53.6037e-51.6531e-53.2677e-44.8171e-41.8934e-52.0885e-640.6229
ASQU IVHHZ1.0538e-53.3908e-63.0376e-61.6077e-65.8826e-71.5759e-51.6449e-58.4654e-79.0358e-856.3172
ASQU IVHHN1.2043e-54.7831e-65.7285e-62.7590e-61.1149e-62.8061e-53.8461e-51.2928e-61.3531e-756.3172
ASQU IVHHE1.4102e-57.0722e-65.3683e-63.0253e-61.4282e-63.7025e-53.6115e-51.6293e-61.8202e-756.3172
POPM GUHHZ8.1715e-62.9795e-63.0078e-62.7402e-61.0877e-62.8335e-51.7176e-51.1463e-61.0554e-781.0252
POPM GUHHN1.6671e-54.9919e-64.9643e-62.1233e-68.1414e-74.8040e-52.4967e-59.6045e-71.1122e-781.0252
POPM GUHHE1.5941e-54.5227e-64.8119e-61.9060e-69.4158e-73.0666e-53.2335e-51.3383e-61.4067e-781.0252
CARD GUHHZ3.4796e-68.5432e-77.9720e-75.4783e-72.4687e-78.0369e-64.1895e-62.7852e-72.9247e-8102.1255
CARD GUHHN9.2888e-63.9840e-63.4499e-62.0238e-68.1379e-72.3869e-52.9656e-51.0587e-61.2229e-7102.1255
CARD GUHHE1.2033e-52.9757e-62.7745e-61.4757e-65.3306e-72.0915e-51.8914e-56.6193e-79.4496e-8102.1255
SARM GUEHZ1.9598e-67.2325e-76.5490e-74.1851e-71.5103e-74.3835e-64.9553e-61.8560e-72.5088e-8105.3265
SARM GUEHN3.0416e-62.3708e-69.5792e-71.0223e-63.3733e-76.3836e-63.9280e-63.6976e-74.9290e-8105.3265
SARM GUEHE2.4629e-61.4270e-61.1749e-61.3028e-65.3564e-73.1618e-67.2600e-66.8707e-74.5662e-8105.3265
MAIM GUHHZ1.9983e-68.6002e-78.9386e-71.0530e-64.9087e-74.4981e-66.3827e-64.4368e-74.3759e-8105.4248
MAIM GUHHN2.3757e-61.6630e-61.3633e-61.9175e-61.0575e-65.4682e-66.0253e-61.1089e-67.6870e-8105.4248
MAIM GUHHE1.7412e-68.9883e-77.6231e-71.0175e-67.4862e-73.6469e-65.5345e-68.4162e-75.2325e-8105.4248
VLC MNHHZ2.6704e-69.3075e-78.1348e-74.6088e-71.7221e-76.2537e-63.3992e-61.8065e-72.3730e-8106.6264
VLC MNHHN1.9099e-69.8134e-76.0768e-75.1810e-73.7324e-74.0716e-64.4304e-63.3452e-73.5012e-8106.6264
VLC MNHHE3.0387e-61.1855e-69.5350e-75.0850e-72.7446e-73.8096e-66.2358e-63.7232e-73.2220e-8106.6264
PII IVHHZ3.1235e-61.1016e-61.0962e-65.7273e-72.5674e-76.3317e-66.2811e-63.0783e-73.0678e-8112.9237
PII IVHHN5.0835e-61.9352e-61.7799e-61.0740e-63.3697e-78.3910e-69.9067e-64.1086e-75.3421e-8112.9237
PII IVHHE4.5620e-61.8650e-61.7132e-61.2870e-64.6572e-76.8024e-69.6768e-65.2999e-76.4313e-8112.9237
EQUI GUHHZ2.1367e-68.9244e-78.5515e-75.7562e-72.3558e-75.2249e-64.7514e-62.9287e-73.1206e-8124.7265
EQUI GUHHN9.5000e-75.0462e-73.7369e-72.0459e-71.0450e-71.4772e-63.2770e-61.5491e-71.4172e-8124.7265
EQUI GUHHE1.5686e-68.6260e-76.0115e-74.2053e-72.3188e-72.9020e-62.8827e-62.8299e-71.8812e-8124.7265
GRAM GUHHZ3.9483e-61.3998e-61.2291e-67.0460e-72.7910e-71.1076e-58.4995e-63.3030e-73.9288e-8133.2282
GRAM GUHHN5.1910e-62.9778e-62.3170e-63.1183e-61.6656e-61.0307e-59.8530e-61.8674e-61.5322e-7133.2282
GRAM GUHHE7.3196e-62.9934e-62.0737e-61.9560e-69.4112e-78.1499e-61.3223e-59.2466e-71.0585e-7133.2282
PLMA GUHHZ1.5288e-65.4529e-75.4653e-73.1264e-71.2907e-73.6551e-63.8107e-61.7371e-72.0462e-8149.9261
PLMA GUHHN2.0361e-69.6649e-75.1084e-72.3425e-71.0273e-74.1926e-63.0194e-61.2774e-71.6847e-8149.9261
PLMA GUHHE1.3174e-64.5435e-73.7377e-73.0619e-71.2043e-72.7698e-62.4398e-61.3144e-71.5632e-8149.9261
*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)

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