Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 23-04-2023 and time 01:53:01 (Italy) in region 5 km NW Castel del Rio (BO)

A magnitude ML 1.7 earthquake occured in region: 5 km NW Castel del Rio (BO), on

  • 22-04-2023 23:53:01 (UTC)
  • 23-04-2023 01:53:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2450, 11.4680 at 22 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
Castel del Rio BO 5 1246 1246
Fontanelice BO 8 1943 3189
Monterenzio BO 10 6035 9224
Borgo Tossignano BO 10 3288 12512
Loiano BO 12 4294 16806
Monghidoro BO 12 3749 20555
Casola Valsenio RA 13 2617 23172
Casalfiumanese BO 13 3438 26610
Firenzuola FI 16 4726 31336
Monzuno BO 16 6328 37664
Palazzuolo sul Senio FI 16 1154 38818
Dozza BO 18 6652 45470
Pianoro BO 19 17460 62930
San Benedetto Val di Sambro BO 19 4315 67245
Castel San Pietro Terme BO 20 20811 88056

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km SW of Imola (69797 inhabitants)
30 Km SE of Bologna (386663 inhabitants)
34 Km W of Faenza (58541 inhabitants)
46 Km W of Forlì (117913 inhabitants)
50 Km NE of Prato (191150 inhabitants)
55 Km NE of Firenze (382808 inhabitants)
56 Km NE of Pistoia (90315 inhabitants)
59 Km NE of Scandicci (50609 inhabitants)
61 Km W of Ravenna (159116 inhabitants)
62 Km SE of Modena (184973 inhabitants)
63 Km W of Cesena (96758 inhabitants)
67 Km S of Ferrara (133155 inhabitants)
76 Km SE of Carpi (70699 inhabitants)
83 Km SE of Reggio nell'Emilia (171345 inhabitants)
89 Km NE of Lucca (89046 inhabitants)
90 Km W of Rimini (147750 inhabitants)
93 Km NW of Arezzo (99543 inhabitants)
96 Km S of Rovigo (51867 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 1.7 2023-04-22
23:53:01		 44.245 11.4675 22 2024-03-01
17:18:06		 Bollettino Sismico Italiano INGV 117143551
Reviewed
Rev100 		ML 1.7 2023-04-22
23:53:01		 44.2352 11.4502 20 2023-04-23
00:00:55		 Sala Sismica INGV-Roma 116625991
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-22 23:53:01 ± 0.14
Latitude 44.2450 ± 0.0063
Longitude 11.4675 ± 0.0075
Depth (km) 22 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 117143551

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 716
Semi-minor axis of confidence ellipse (meter) 120
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 19
Circular confidence region, given by single value of horizontal uncertainty (meter) 720.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 74
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 43
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.38
Epicentral distance of station closest to the epicenter (degree) 0.06115
Epicentral distance of station farthest from the epicenter (degree) 1.40384
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 27
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 49
Type of magnitude ML
Reference to an origin 117143551
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-05-08 09:20:30

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 50
Type of magnitude ML
Reference to an origin 116625991
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-23 00:00:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
OX.MARN.HHZ. 2023-04-22T23:53:26.66 0.3 undecidable manual P 353 155.8218 54 0.23 53
IV.ATFO.HHZ. 2023-04-22T23:53:23.41 0.3 undecidable manual P 137 131.5683 95 0.28 56
IV.BDI.HHZ. 2023-04-22T23:53:23.76 0.6 undecidable manual S 254 72.2721 100 0.41 42
IV.ZOVE.EHZ. 2023-04-22T23:53:23.22 0.3 undecidable manual P 1 134.0658 95 -0.29 57
IV.CRMI.HHZ. 2023-04-22T23:53:21.18 0.3 undecidable manual S 218 63.2922 102 0.19 67
GU.POPM.HHZ. 2023-04-22T23:53:20.99 1.0 undecidable manual S 249 60.7947 102 0.65 20
IV.CAFI.HHZ. 2023-04-22T23:53:20.09 0.3 undecidable manual P 158 109.113 96 0.41 58
GU.EQUI.HHZ. 2023-04-22T23:53:19.69 0.6 undecidable manual P 266 104.9172 96 0.65 36
IV.SFI.EHZ. 2023-04-22T23:53:18.02 0.3 undecidable manual S 141 48.3183 106 0.9 53
IV.PII.HHZ. 2023-04-22T23:53:17.53 0.3 undecidable manual P 233 95.0382 97 0.01 65
IV.RUFI.EHE. 2023-04-22T23:53:17.29 0.3 undecidable manual S 176 45.2214 107 0.95 53
MN.VLC.HHZ. 2023-04-22T23:53:16.05 0.3 undecidable manual P 264 86.4468 98 -0.17 64
IV.SSP9.EHZ. 2023-04-22T23:53:16.26 0.3 undecidable manual P 144 91.4418 98 -0.72 55
IV.MPPT.EHZ. 2023-04-22T23:53:16.06 0.3 undecidable manual S 223 43.8228 108 0.1 71
IV.PARC.HHZ. 2023-04-22T23:53:16.46 0.3 undecidable manual P 137 90.3429 98 -0.35 62
IV.ZCCA.HHZ. 2023-04-22T23:53:15.34 0.3 undecidable manual S 287 40.7259 110 0.16 71
IV.CRE.HHZ. 2023-04-22T23:53:15.19 0.3 undecidable manual P 151 79.4649 99 0.03 66
IV.BDI.HHZ. 2023-04-22T23:53:14.36 0.3 undecidable manual P 254 72.2721 100 0.3 64
IV.VMGN.HHZ. 2023-04-22T23:53:13.58 0.3 undecidable manual S 171 32.6451 115 0.39 67
IV.BOSL.HHZ. 2023-04-22T23:53:13.71 0.3 undecidable manual S 192 35.6421 113 -0.2 70
IV.MOCL.EHZ. 2023-04-22T23:53:13.93 0.3 undecidable manual S 221 35.0427 113 0.15 71
IV.CRMI.HHZ. 2023-04-22T23:53:12.98 0.3 undecidable manual P 218 63.2922 102 0.29 65
IV.FNVD.HHZ. 2023-04-22T23:53:12.36 0.3 undecidable manual S 253 28.749 119 0.1 73
IV.IMOL.EHZ. 2023-04-22T23:53:12.02 0.3 undecidable manual S 60 25.2525 123 0.55 66
IV.LMD.HHZ. 2023-04-22T23:53:11.94 0.3 undecidable manual S 134 26.6511 122 0.16 71
4P.IT09A.HHZ. 2023-04-22T23:53:11.06 0.6 undecidable manual P 357 46.1205 107 0.93 36
GU.POPM.HHZ. 2023-04-22T23:53:11.87 1.0 undecidable manual P 249 60.7947 102 -0.45 21
IV.SFI.EHZ. 2023-04-22T23:53:10.00 0.3 undecidable manual P 141 48.3183 106 -0.46 65
IV.SEI.HHZ. 2023-04-22T23:53:10.98 0.3 undecidable manual S 202 22.8549 126 0.03 74
IV.MPPT.EHZ. 2023-04-22T23:53:09.12 0.3 undecidable manual P 223 43.8228 108 -0.68 60
IV.MTRZ.HHZ. 2023-04-22T23:53:09.68 0.3 undecidable manual S 336 8.2806 156 1.23 52
IV.RUFI.EHE. 2023-04-22T23:53:09.74 1.0 undecidable manual P 176 45.2214 107 -0.26 23
IV.ZCCA.HHZ. 2023-04-22T23:53:09.75 0.3 undecidable manual P 287 40.7259 110 0.41 66
IV.MOCL.EHZ. 2023-04-22T23:53:08.01 0.3 undecidable manual P 221 35.0427 113 -0.52 65
IV.BOSL.HHZ. 2023-04-22T23:53:08.35 0.3 undecidable manual P 192 35.6421 113 -0.26 69
IV.VMGN.HHZ. 2023-04-22T23:53:07.91 0.3 undecidable manual P 171 32.6451 115 -0.28 69
IV.VISG.HHZ. 2023-04-22T23:53:07.76 0.3 undecidable manual S 203 6.7932 160 -0.55 66
IV.FNVD.HHZ. 2023-04-22T23:53:06.61 0.6 undecidable manual P 253 28.749 119 -1.04 35
IV.IMOL.EHZ. 2023-04-22T23:53:06.84 0.6 undecidable manual P 60 25.2525 123 -0.35 46
IV.LMD.HHZ. 2023-04-22T23:53:06.83 0.3 undecidable manual P 134 26.6511 122 -0.55 66
IV.SEI.HHZ. 2023-04-22T23:53:06.37 0.1 positive manual P 202 22.8549 126 -0.53 88
IV.MTRZ.HHZ. 2023-04-22T23:53:05.40 0.1 negative manual P 336 8.2806 156 -0.06 100
IV.VISG.HHZ. 2023-04-22T23:53:04.73 0.1 undecidable manual P 203 6.7932 160 -0.64 86
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHE. ML:2.3 0.001471 0.18 AML other m 2023-04-22T23:53:08.13
IV.VISG.HHN. ML:2.1 0.0010055 1.14 AML other m 2023-04-22T23:53:08.06
IV.MTRZ.HHE. ML:2.6 0.0031100000000000004 0.56 AML other m 2023-04-22T23:53:10.46
IV.MTRZ.HNE. ML:2.6 0.00296 0.56 AML other m 2023-04-22T23:53:10.46
IV.MTRZ.HHN. ML:2.6 0.0027949999999999997 0.22 AML other m 2023-04-22T23:53:10.88
IV.MTRZ.HNN. ML:2.6 0.002685 0.22 AML other m 2023-04-22T23:53:10.88
IV.SEI.HHN. ML:2.3 0.0009495 0.2 AML other m 2023-04-22T23:53:11.32
IV.SEI.HHE. ML:2.0 0.00046950000000000003 0.44 AML other m 2023-04-22T23:53:11.44
IV.FNVD.HHN. ML:1.9 0.000307 0.28 AML other m 2023-04-22T23:53:12.70
IV.FNVD.HHE. ML:1.8 0.00023449999999999998 1.06 AML other m 2023-04-22T23:53:12.45
IV.VMGN.HHE. ML:1.3 0.0000809 0.52 AML other m 2023-04-22T23:53:14.53
IV.IMOL.HNE. ML:2.0 0.00047250000000000005 1.1 AML other m 2023-04-22T23:53:14.84
IV.VMGN.HHN. ML:1.5 0.00010889999999999999 0.46 AML other m 2023-04-22T23:53:15.00
IV.BOSL.HHN. ML:1.3 0.00006544999999999999 1.1 AML other m 2023-04-22T23:53:15.90
IV.BOSL.HHE. ML:1.3 0.00006295000000000001 0.28 AML other m 2023-04-22T23:53:15.36
IV.SFI.EHN. ML:1.5 0.0000837 0.86 AML other m 2023-04-22T23:53:18.39
IV.MPPT.EHN. ML:1.3 0.0000499 0.58 AML other m 2023-04-22T23:53:19.72
IV.SFI.EHE. ML:1.8 0.000145 0.88 AML other m 2023-04-22T23:53:20.67
IV.MPPT.EHE. ML:1.3 0.000052249999999999996 0.32 AML other m 2023-04-22T23:53:21.12
IV.IMOL.HNN. ML:1.9 0.00038649999999999996 0.4 AML other m 2023-04-22T23:53:21.22
IV.ZCCA.HHN. ML:1.3 0.000054900000000000006 0.38 AML other m 2023-04-22T23:53:22.49
IV.CRMI.HHE. ML:1.0 0.00002065 0.42 AML other m 2023-04-22T23:53:23.28
IV.CRMI.HHN. ML:1.4 0.00004155 0.58 AML other m 2023-04-22T23:53:24.08
GU.POPM.HHN. ML:1.6 0.00007625000000000001 0.56 AML other m 2023-04-22T23:53:24.08
IV.ZCCA.HHE. ML:1.2 0.0000475 1.12 AML other m 2023-04-22T23:53:25.63
GU.POPM.HHE. ML:1.6 0.00007364999999999999 0.76 AML other m 2023-04-22T23:53:26.73
IV.BDI.HHE. ML:1.7 0.00007935 0.32 AML other m 2023-04-22T23:53:27.20
IV.BDI.HHN. ML:1.8 0.00008665 0.46 AML other m 2023-04-22T23:53:27.57
IV.PII.HHE. ML:1.7 0.00004985 0.28 AML other m 2023-04-22T23:53:32.47
IV.PII.HHN. ML:1.7 0.00005365 0.5 AML other m 2023-04-22T23:53:33.19
IV.PARC.HHN. ML:1.5 0.0000335 0.62 AML other m 2023-04-22T23:53:33.65
IV.CRE.HHN. ML:1.6 0.0000625 1.52 AML other m 2023-04-22T23:53:34.18
IV.PARC.HHE. ML:1.5 0.000033549999999999996 0.4 AML other m 2023-04-22T23:53:36.64
IV.CRE.HHE. ML:1.5 0.00004175 0.8 AML other m 2023-04-22T23:53:36.96
GU.EQUI.HHN. ML:1.4 0.0000207 1.14 AML other m 2023-04-22T23:53:36.81
GU.EQUI.HHE. ML:1.4 0.00002615 0.64 AML other m 2023-04-22T23:53:38.54
IV.CAFI.HHE. ML:1.6 0.0000351 0.42 AML other m 2023-04-22T23:53:39.44
IV.CAFI.HHN. ML:1.5 0.000025849999999999998 0.42 AML other m 2023-04-22T23:53:40.52
IV.ZOVE.EHE. ML:2.2 0.00010295 0.34 AML other m 2023-04-22T23:53:41.49
IV.ZOVE.EHN. ML:2.1 0.00007395000000000001 0.86 AML other m 2023-04-22T23:53:44.73
IV.ATFO.HHE. ML:1.7 0.000032500000000000004 0.68 AML other m 2023-04-22T23:53:47.47
OX.MARN.HHN. ML:2.0 0.0000475 0.28 AML other m 2023-04-22T23:53:49.76
IV.ATFO.HHN. ML:1.5 0.0000206 0.7 AML other m 2023-04-22T23:53:49.55
OX.MARN.HHE. ML:2.0 0.0000449 0.4 AML other m 2023-04-22T23:53:52.67
ST.DOSS.HHE. ML:2.3 0.000063 1.6 AML other m 2023-04-22T23:53:54.04
ST.DOSS.HHN. ML:2.1 0.000042 1.56 AML other m 2023-04-22T23:54:00.18
OX.CAE.HHE. ML:1.9 0.000020150000000000002 0.42 AML other m 2023-04-22T23:54:08.52
OX.CAE.HHN. ML:1.6 0.0000097385 0.54 AML other m 2023-04-22T23:54:09.27
NI.POLC.HHN. ML:2.1 0.000029350000000000002 0.4 AML other m 2023-04-22T23:54:12.21
NI.POLC.HHE. ML:2.0 0.000024550000000000004 0.44 AML other m 2023-04-22T23:54:15.38
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