Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 20-10-2021 and time 02:09:23 (Italy) in region 6 km SE Corte Brugnatella (PC)

A magnitude ML 2.3 earthquake occured in region: 6 km SE Corte Brugnatella (PC), on

  • 20-10-2021 00:09:23 (UTC)
  • 20-10-2021 02:09:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.6800, 9.4340 at 3 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Corte Brugnatella PC 6 586 586
Ferriere PC 6 1294 1880
Cerignale PC 7 127 2007
Coli PC 7 879 2886
Ottone PC 10 516 3402
Bobbio PC 10 3577 6979
Farini PC 12 1290 8269
Zerba PC 12 77 8346
Brallo di Pregola PV 14 599 8945
Gorreto GE 14 97 9042
Santo Stefano d'Aveto GE 15 1126 10168
Rovegno GE 17 554 10722
Bettola PC 17 2828 13550
Rezzoaglio GE 17 995 14545
Fontanigorda GE 18 277 14822
Menconico PV 18 360 15182
Santa Margherita di Staffora PV 18 473 15655
Romagnese PV 19 687 16342

Municipalities with at least 50000 inhabitants

An earthquake occurred to
46 Km SW of Piacenza (102191 inhabitants)
50 Km NE of Genova (586655 inhabitants)
60 Km SE of Pavia (72576 inhabitants)
69 Km SW of Cremona (71901 inhabitants)
70 Km E of Alessandria (93943 inhabitants)
71 Km NW of La Spezia (93959 inhabitants)
72 Km W of Parma (192836 inhabitants)
84 Km SE of Vigevano (63310 inhabitants)
85 Km NW of Carrara (63133 inhabitants)
86 Km E of Savona (61345 inhabitants)
90 Km S of Milano (1345851 inhabitants)
91 Km NW of Massa (69479 inhabitants)
95 Km W of Reggio nell'Emilia (171345 inhabitants)
96 Km S of Sesto San Giovanni (81608 inhabitants)
99 Km S of Cinisello Balsamo (75078 inhabitants)
99 Km SE of Rho (50434 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 2.3 2021-10-20
00:09:23		 44.6795 9.4337 3 2022-03-30
13:04:25		 Bollettino Sismico Italiano INGV 99284341
Reviewed
Rev100 		ML 2.2 2021-10-20
00:09:23		 44.6823 9.4482 2 2021-10-20
00:46:42		 Sala Sismica INGV-Roma 96778041
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-20 00:09:23 ± 0.13
Latitude 44.6795 ± 0.0063
Longitude 9.4337 ± 0.0101
Depth (km) 3 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99284341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 656
Semi-minor axis of confidence ellipse (meter) 608
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 126
Circular confidence region, given by single value of horizontal uncertainty (meter) 660.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 38
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.48
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.66195
Number of stations at which the event was observed 34
Number of stations from which data was used for origin computation 29
Magnitudes information

ML:2.2

Field Value
Value 2.2
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 96778041
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-20 00:46:42

ML:2.3

Field Value
Value 2.3
Uncertainty 0.4
Num. used stations 72
Type of magnitude ML
Reference to an origin 99284341
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-16 15:44:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHZ. 2021-10-20T00:11:17.26 3.0 undecidable manual Sg 9.97 0
OT.OT11.EHZ. 2021-10-20T00:10:59.03 3.0 positive manual Pg 13.75 0
IV.VIVA.HHZ. 2021-10-20T00:10:34.67 3.0 positive manual Pg 10.71 0
IV.MNTT.EHZ. 2021-10-20T00:10:20.32 3.0 negative manual Pn 1.66 0
IV.CSP1.EHZ. 2021-10-20T00:10:17.18 3.0 undecidable manual Pn 2.13 0
IV.MDI.HHZ. 2021-10-20T00:10:01.80 1.0 undecidable manual S 10 122.988 50 1.16 15
GU.MAIM.HHZ. 2021-10-20T00:10:00.50 0.6 undecidable manual S 135 119.4915 50 0.78 35
SI.LUSI.HHZ. 2021-10-20T00:09:53.40 0.3 undecidable manual P 39 184.4709 38 -1.05 37
GU.BHB.HHZ. 2021-10-20T00:09:52.89 0.3 undecidable manual P 277 171.8946 50 0.34 51
ST.RONC.EHZ. 2021-10-20T00:09:52.35 0.6 undecidable manual P 32 171.495 50 -0.15 36
GU.CIRO.HHZ. 2021-10-20T00:09:52.78 0.3 undecidable manual P 306 178.2882 50 -0.76 43
IV.MPPT.EHZ. 2021-10-20T00:09:50.51 0.3 undecidable manual P 121 153.9348 50 0.72 50
GU.TRAV.HHZ. 2021-10-20T00:09:50.82 0.3 undecidable manual P 306 161.2164 50 -0.09 57
IV.ZEN8.EHZ. 2021-10-20T00:09:48.78 0.3 undecidable manual P 43 147.0417 50 0.06 61
GU.EQUI.HHZ. 2021-10-20T00:09:48.50 0.6 undecidable manual S 135 80.5638 50 -0.83 37
IV.MAGA.HHZ. 2021-10-20T00:09:48.87 0.3 undecidable manual P 37 153.2355 50 -0.82 48
IV.PII.HHZ. 2021-10-20T00:09:47.38 0.1 undecidable manual P 140 137.1627 50 0.17 81
IV.ZCCA.HHZ. 2021-10-20T00:09:47.33 0.6 undecidable manual P 106 127.3725 50 1.63 22
IV.SALO.HHZ. 2021-10-20T00:09:47.87 0.3 undecidable manual P 39 134.6652 50 1.05 45
IV.SGAL.EHZ. 2021-10-20T00:09:45.39 0.1 undecidable manual P 35 119.6913 50 0.88 67
IV.MDI.HHZ. 2021-10-20T00:09:45.65 0.3 undecidable manual P 10 122.988 50 0.64 55
GU.RORO.HHZ. 2021-10-20T00:09:45.32 0.1 undecidable manual P 240 125.2746 50 -0.05 85
GU.MAIM.HHZ. 2021-10-20T00:09:45.03 0.6 undecidable manual P 135 119.4915 50 0.55 38
GU.CANO.HHZ. 2021-10-20T00:09:43.03 0.1 undecidable manual P 241 108.2139 50 0.28 84
GU.CARD.HHZ. 2021-10-20T00:09:43.25 0.1 undecidable manual P 131 110.3118 50 0.18 85
GU.GRAM.HHZ. 2021-10-20T00:09:42.10 0.3 undecidable manual S 113 54.1014 50 -0.17 72
IV.PCN.EHZ. 2021-10-20T00:09:40.39 0.3 undecidable manual S 30 45.621 94 0.84 59
GU.EQUI.HHZ. 2021-10-20T00:09:38.09 0.3 undecidable manual P 135 80.5638 50 -0.39 65
IV.MSSA.HHZ. 2021-10-20T00:09:38.00 0.3 undecidable manual S 171 40.8258 95 0.11 74
GU.RNCA.HHZ. 2021-10-20T00:09:38.70 0.3 undecidable manual S 239 44.622 94 -0.48 68
IV.PLMA.HHE. 2021-10-20T00:09:37.20 0.3 undecidable manual P 154 77.367 50 -0.79 57
GU.PCP.HHZ. 2021-10-20T00:09:36.56 0.1 undecidable manual P 258 71.7726 50 -0.57 84
IV.SARZ.HHZ. 2021-10-20T00:09:33.44 0.6 undecidable manual P 297 45.9207 94 0.54 45
GU.GENL.EHN. 2021-10-20T00:09:33.18 0.3 undecidable manual P 231 47.619 94 -0.05 74
GU.GRAM.HHZ. 2021-10-20T00:09:33.54 0.1 negative manual P 113 54.1014 50 -0.87 77
IV.PCN.EHZ. 2021-10-20T00:09:32.86 0.1 positive manual P 30 45.621 94 0.03 100
GU.RNCA.HHZ. 2021-10-20T00:09:32.34 0.1 positive manual P 239 44.622 94 -0.28 95
IT.GNV.HGE. 2021-10-20T00:09:32.95 0.3 undecidable manual P 235 48.2184 94 -0.41 69
IV.MSSA.HHZ. 2021-10-20T00:09:31.58 0.1 positive manual P 171 40.8258 95 -0.3 95
GU.GORR.HHZ. 2021-10-20T00:09:29.75 0.3 undecidable manual S 234 13.6752 104 1.17 53
GU.GORR.HHZ. 2021-10-20T00:09:27.43 0.1 positive manual P 234 13.6752 104 0.93 80
IV.BOB.HNZ. 2021-10-20T00:09:26.60 0.1 undecidable manual S 7 9.879 109 -0.7 89
IV.BOB.HNZ. 2021-10-20T00:09:25.36 0.1 negative manual P 7 9.879 109 -0.4 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BOB.HHN. ML:3.3 0.039290065 0.18 AML other m 2021-10-20T00:09:26.81
IV.BOB.HNN. ML:3.3 0.03743692999999999 0.19 AML other m 2021-10-20T00:09:26.82
IV.BOB.HNE. ML:3.0 0.019444405 1.92 AML other m 2021-10-20T00:09:26.03
IV.BOB.HHE. ML:3.1 0.021585595000000003 0.08 AML other m 2021-10-20T00:09:27.03
GU.GORR.HHE. ML:2.2 0.0022780765 0.22 AML other m 2021-10-20T00:09:30.35
GU.GORR.HHN. ML:2.3 0.0023816094999999995 0.2 AML other m 2021-10-20T00:09:30.57
IV.MSSA.HHN. ML:2.8 0.0020973850000000002 0.1 AML other m 2021-10-20T00:09:38.78
IV.MSSA.HHE. ML:2.9 0.0029913254999999997 0.1 AML other m 2021-10-20T00:09:38.79
GU.RNCA.HHN. ML:1.9 0.0002252167 0.32 AML other m 2021-10-20T00:09:40.24
GU.RNCA.HHE. ML:2.0 0.00029868265 0.36 AML other m 2021-10-20T00:09:40.69
IV.PCN.EHE. ML:2.4 0.000755 0.6 AML other m 2021-10-20T00:09:41.18
IV.PCN.HNE. ML:2.4 0.0007676098 0.6 AML other m 2021-10-20T00:09:41.18
IV.PCN.EHN. ML:2.6 0.001246473 0.62 AML other m 2021-10-20T00:09:41.52
IV.PCN.HNN. ML:2.6 0.0011846341 0.63 AML other m 2021-10-20T00:09:41.52
GU.GRAM.HHN. ML:2.1 0.00030141085 0.2 AML other m 2021-10-20T00:09:42.88
GU.GRAM.HHE. ML:2.1 0.00031237695 0.18 AML other m 2021-10-20T00:09:43.52
IV.SARZ.HNN. ML:2.1 0.00035038020000000003 0.42 AML other m 2021-10-20T00:09:49.63
IV.SARZ.HHE. ML:2.0 0.00031128449999999995 0.62 AML other m 2021-10-20T00:09:49.90
IV.SARZ.HHN. ML:2.1 0.0003398876 0.4 AML other m 2021-10-20T00:09:50.32
GU.EQUI.HHN. ML:1.7 0.00006755856 0.24 AML other m 2021-10-20T00:09:50.90
GU.PCP.HHE. ML:1.5 0.000048763545000000005 0.36 AML other m 2021-10-20T00:09:53.53
GU.PCP.HHN. ML:1.4 0.000046814435 0.36 AML other m 2021-10-20T00:09:54.18
GU.EQUI.HHE. ML:1.8 0.000081997605 0.28 AML other m 2021-10-20T00:09:54.62
IV.SARZ.HNE. ML:2.1 0.000369719 1.4 AML other m 2021-10-20T00:09:55.12
ST.RONC.HNE. ML:2.7 0.00019870532000000002 0.84 AML other m 2021-10-20T00:09:57.00
GU.CANO.HHE. ML:2.1 0.0001125489 0.36 AML other m 2021-10-20T00:09:57.80
GU.CANO.HHN. ML:2.2 0.000130020585 0.3 AML other m 2021-10-20T00:09:58.17
GU.RORO.HHE. ML:2.6 0.00025439 0.9 AML other m 2021-10-20T00:09:59.07
GU.CARD.HHE. ML:2.5 0.00024480875000000004 0.28 AML other m 2021-10-20T00:10:00.80
GU.MAIM.HHN. ML:2.2 0.00011387515000000001 0.36 AML other m 2021-10-20T00:10:01.66
GU.CARD.HHN. ML:2.4 0.00020408235 0.2 AML other m 2021-10-20T00:10:01.52
GU.MAIM.HHE. ML:1.8 0.000051020445 0.34 AML other m 2021-10-20T00:10:02.03
IV.SGAL.EHE. ML:2.3 0.00016047083 0.46 AML other m 2021-10-20T00:10:02.66
IV.SGAL.EHN. ML:2.5 0.00021347875 0.42 AML other m 2021-10-20T00:10:02.77
GU.RORO.HHN. ML:1.6 0.000029407265 0.14 AML other m 2021-10-20T00:10:03.79
IV.MDI.HHN. ML:2.3 0.00014490829999999998 0.36 AML other m 2021-10-20T00:10:04.68
IV.MDI.HHE. ML:2.5 0.00021442709999999998 0.42 AML other m 2021-10-20T00:10:05.33
IV.PII.HHN. ML:2.1 0.00007285796 0.28 AML other m 2021-10-20T00:10:06.03
IV.PII.HHE. ML:2.2 0.000095750275 0.22 AML other m 2021-10-20T00:10:06.30
IV.SALO.HNN. ML:2.8 0.00035064130000000005 0.67 AML other m 2021-10-20T00:10:07.43
IV.SALO.HHN. ML:2.7 0.00031478455 0.66 AML other m 2021-10-20T00:10:07.54
IV.ZEN8.EHN. ML:2.2 0.000088445915 0.5 AML other m 2021-10-20T00:10:09.21
IV.ZEN8.EHE. ML:1.8 0.000031742765 0.28 AML other m 2021-10-20T00:10:09.30
ST.RONC.HNN. ML:2.8 0.00022924954999999997 0.92 AML other m 2021-10-20T00:10:09.48
IV.SALO.HNE. ML:2.3 0.00013393668 0.36 AML other m 2021-10-20T00:10:10.62
IV.SALO.HHE. ML:2.3 0.00012713585 0.32 AML other m 2021-10-20T00:10:10.61
IV.MAGA.HHN. ML:2.7 0.00025002125000000004 1.7 AML other m 2021-10-20T00:10:11.89
IV.MAGA.HHE. ML:3.0 0.00044684639999999996 0.38 AML other m 2021-10-20T00:10:13.63
GU.TRAV.HHN. ML:1.8 0.000030391965 0.26 AML other m 2021-10-20T00:10:14.17
IV.MPPT.EHE. ML:1.8 0.00003010765 1.46 AML other m 2021-10-20T00:10:14.92
ST.RONC.EHN. ML:2.8 0.00023581554999999998 0.22 AML other m 2021-10-20T00:10:16.48
IV.MPPT.EHN. ML:1.8 0.00003065046 1.44 AML other m 2021-10-20T00:10:16.80
IV.ZCCA.HHN. ML:2.0 0.00006217274 1.52 AML other m 2021-10-20T00:10:16.17
GU.TRAV.HHE. ML:2.0 0.00004272384 0.32 AML other m 2021-10-20T00:10:17.34
ST.RONC.EHE. ML:2.5 0.0001293783 0.22 AML other m 2021-10-20T00:10:17.42
GU.BHB.HNN. ML:1.9 0.000035298635000000004 0.67 AML other m 2021-10-20T00:10:17.44
GU.BHB.HHN. ML:1.9 0.000037230066500000006 0.52 AML other m 2021-10-20T00:10:17.45
IV.ZEN8.HNN. ML:2.5 0.000176186535 1.01 AML other m 2021-10-20T00:10:18.51
SI.LUSI.HHN. ML:2.6 0.00012775595 0.28 AML other m 2021-10-20T00:10:19.69
GU.CIRO.HHN. ML:1.6 0.0000158759045 0.5 AML other m 2021-10-20T00:10:20.09
GU.CIRO.HHE. ML:1.6 0.000014444736999999999 1.56 AML other m 2021-10-20T00:10:21.20
IV.ZEN8.HNE. ML:2.4 0.00013352228 0.8 AML other m 2021-10-20T00:10:21.81
SI.LUSI.HHE. ML:2.4 0.00008022892000000002 0.68 AML other m 2021-10-20T00:10:22.79
GU.BHB.HNE. ML:2.0 0.00004382844 1.47 AML other m 2021-10-20T00:10:23.98
IV.MNTT.EHE. ML:2.8 0.00004106916 0.1 AML other m 2021-10-20T00:10:23.35
GU.BHB.HHE. ML:2.0 0.000040462895 0.68 AML other m 2021-10-20T00:10:23.00
IV.ZCCA.HNE. ML:2.3 0.00012607119499999999 1 AML other m 2021-10-20T00:10:30.08
IV.ZCCA.HNN. ML:2.5 0.00019440062500000003 1.05 AML other m 2021-10-20T00:10:31.05
IV.ZCCA.HHE. ML:2.0 0.00007132803 1.14 AML other m 2021-10-20T00:10:37.73
IV.CSP1.EHN. ML:2.6 0.000029250239999999996 1.02 AML other m 2021-10-20T00:10:44.48
IV.CSP1.EHE. ML:2.8 0.000048622040000000006 0.8 AML other m 2021-10-20T00:11:14.11
IV.MNTT.EHN. ML:2.7 0.000035688895 1.3 AML other m 2021-10-20T00:11:27.22
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in miniseed + resp format Download