Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 23-04-2023 and time 00:56:00 (Italy) in region 5 km NW Castel del Rio (BO)

A magnitude ML 2.0 earthquake occured in region: 5 km NW Castel del Rio (BO), on

  • 22-04-2023 22:56:00 (UTC)
  • 23-04-2023 00:56:00 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2520, 11.4670 at 25 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 7 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
Monzuno BO 16 6328 32938
Firenzuola FI 16 4726 37664
Palazzuolo sul Senio FI 17 1154 38818
Dozza BO 18 6652 45470
Pianoro BO 18 17460 62930
San Benedetto Val di Sambro BO 19 4315 67245
Castel San Pietro Terme BO 19 20811 88056

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km W of Imola (69797 inhabitants)
29 Km SE of Bologna (386663 inhabitants)
33 Km W of Faenza (58541 inhabitants)
46 Km W of Forlì (117913 inhabitants)
51 Km NE of Prato (191150 inhabitants)
56 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)
61 Km SE of Modena (184973 inhabitants)
63 Km W of Cesena (96758 inhabitants)
66 Km S of Ferrara (133155 inhabitants)
75 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)
95 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 2.0 2023-04-22
22:56:00		 44.2523 11.4672 25 2024-03-01
17:18:08		 Bollettino Sismico Italiano INGV 117406201
Reviewed
Rev100 		ML 2.1 2023-04-22
22:56:00		 44.2355 11.4813 25 2023-04-22
23:04:25		 Sala Sismica INGV-Roma 116623871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-22 22:56:00 ± 0.11
Latitude 44.2523 ± 0.0072
Longitude 11.4672 ± 0.0113
Depth (km) 25 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 117406201

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 817
Semi-minor axis of confidence ellipse (meter) 597
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 95
Circular confidence region, given by single value of horizontal uncertainty (meter) 820.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 49
Number of associated phases, regardless of their use for origin computation 44
Number of defining phases 44
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.42
Epicentral distance of station closest to the epicenter (degree) 0.06745
Epicentral distance of station farthest from the epicenter (degree) 2.31126
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 33
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.4
Num. used stations 52
Type of magnitude ML
Reference to an origin 117406201
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-02-07 15:44:52

ML:2.1

Field Value
Value 2.1
Uncertainty 0.4
Num. used stations 54
Type of magnitude ML
Reference to an origin 116623871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-22 23:04:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
OX.SABO.HHZ. 2023-04-22T22:56:36.51 0.3 undecidable manual P 41 256.5543 54 -1.23 20
OX.MLN.HHZ. 2023-04-22T22:56:33.46 0.3 undecidable manual P 23 228.7932 54 -0.83 30
NI.POLC.HHZ. 2023-04-22T22:56:31.53 0.3 undecidable manual P 22 212.7315 54 -0.76 34
IV.CTI.HHZ. 2023-04-22T22:56:29.92 1.0 undecidable manual P 4 199.7445 54 -0.75 12
SI.LUSI.HHZ. 2023-04-22T22:56:29.58 0.3 undecidable manual P 348 193.7616 54 -0.35 43
IV.MAGA.HHZ. 2023-04-22T22:56:28.32 0.6 undecidable manual P 339 181.2852 54 -0.06 33
ST.VARA.EHZ. 2023-04-22T22:56:28.07 0.3 undecidable manual P 346 180.1863 54 -0.17 48
ST.DOSS.HHZ. 2023-04-22T22:56:27.84 0.6 undecidable manual P 353 181.9845 54 -0.62 28
IV.ROVR.HHZ. 2023-04-22T22:56:26.19 0.6 undecidable manual P 349 157.7199 54 0.74 30
OX.MARN.HHZ. 2023-04-22T22:56:26.02 0.6 undecidable manual P 353 155.0226 54 0.92 28
IV.ZOVE.EHZ. 2023-04-22T22:56:22.89 0.3 undecidable manual P 1 133.2666 54 0.49 54
IV.SFI.EHZ. 2023-04-22T22:56:17.58 0.3 undecidable manual S 142 49.0176 110 0.92 53
IV.SSP9.EHZ. 2023-04-22T22:56:16.78 0.3 undecidable manual P 145 92.1411 100 0.54 57
IV.MPPT.EHZ. 2023-04-22T22:56:15.60 0.6 undecidable manual S 223 44.4222 113 0.1 47
IV.PARC.HHZ. 2023-04-22T22:56:15.98 0.3 undecidable manual P 137 91.0422 100 -0.1 64
IV.OSSC.HHZ. 2023-04-22T22:56:15.21 0.3 undecidable manual P 192 82.7505 101 0.38 61
GU.GSCL.HHZ. 2023-04-22T22:56:14.24 0.3 undecidable manual P 279 70.6737 103 1.24 45
IV.BOSL.HHZ. 2023-04-22T22:56:14.05 0.6 undecidable manual S 192 36.4413 118 0.47 44
IV.FIU.EHN. 2023-04-22T22:56:14.14 0.6 undecidable manual S 3 43.0236 113 -1.04 33
IV.BDI.HHZ. 2023-04-22T22:56:14.07 0.3 undecidable manual P 253 72.4719 103 0.79 55
IV.MOCL.EHZ. 2023-04-22T22:56:13.58 0.3 undecidable manual S 220 35.742 118 0.17 70
IV.VMGN.HHZ. 2023-04-22T22:56:13.08 0.3 undecidable manual S 171 33.4443 120 0.19 70
IV.CRMI.HHZ. 2023-04-22T22:56:12.28 0.6 undecidable manual P 218 63.8916 105 0.29 43
IV.LMD.HHZ. 2023-04-22T22:56:11.44 0.3 undecidable manual S 135 27.2505 127 -0.06 72
GU.POPM.HHZ. 2023-04-22T22:56:11.69 0.3 undecidable manual P 248 61.0944 106 0.12 68
IV.FNVD.HHZ. 2023-04-22T22:56:11.89 0.3 undecidable manual S 251 28.9488 125 0.03 72
IV.SEI.HHZ. 2023-04-22T22:56:10.48 0.3 undecidable manual S 202 23.6541 131 -0.27 69
IV.BRSN.HNE. 2023-04-22T22:56:10.98 0.3 undecidable manual P 86 48.8178 110 1.2 46
IV.SFI.EHZ. 2023-04-22T22:56:09.62 0.1 undecidable manual P 142 49.0176 110 -0.19 91
IV.MTRZ.HHZ. 2023-04-22T22:56:09.15 0.3 undecidable manual S 333 7.4814 161 0.86 61
IV.RUFI.EHE. 2023-04-22T22:56:09.33 0.3 undecidable manual P 176 46.1205 112 -0.05 70
4P.IT09A.HHZ. 2023-04-22T22:56:09.60 0.6 undecidable manual P 357 45.3213 112 0.33 44
IV.ZCCA.HHZ. 2023-04-22T22:56:09.24 0.3 undecidable manual P 286 40.4262 115 0.66 62
IV.FIU.EHN. 2023-04-22T22:56:09.42 0.3 undecidable manual P 3 43.0236 113 0.47 65
IV.MPPT.EHZ. 2023-04-22T22:56:08.69 0.1 undecidable manual P 223 44.4222 113 -0.45 86
IV.VMGN.HHZ. 2023-04-22T22:56:07.54 0.3 undecidable manual P 171 33.4443 120 -0.09 71
IV.VISG.HHZ. 2023-04-22T22:56:07.52 0.3 undecidable manual S 200 7.4814 161 -0.77 60
IV.BOSL.HHZ. 2023-04-22T22:56:07.97 0.3 undecidable manual P 192 36.4413 118 -0.06 71
IV.MOCL.EHZ. 2023-04-22T22:56:07.38 0.3 undecidable manual P 220 35.742 118 -0.54 63
IV.LMD.HHZ. 2023-04-22T22:56:06.41 0.1 undecidable manual P 135 27.2505 127 -0.42 89
IV.FNVD.HHZ. 2023-04-22T22:56:06.31 0.1 undecidable manual P 251 28.9488 125 -0.73 79
IV.SEI.HHZ. 2023-04-22T22:56:05.93 0.1 undecidable manual P 202 23.6541 131 -0.46 89
IV.VISG.HHZ. 2023-04-22T22:56:04.33 0.1 undecidable manual P 200 7.4814 161 -0.65 85
IV.MTRZ.HHZ. 2023-04-22T22:56:04.98 0.1 negative manual P 333 7.4814 161 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHE. ML:2.6 0.002265 0.32 AML other m 2023-04-22T22:56:07.69
IV.VISG.HHN. ML:2.4 0.0015699999999999998 0.5 AML other m 2023-04-22T22:56:07.88
IV.MTRZ.HHE. ML:2.8 0.00425 1.44 AML other m 2023-04-22T22:56:10.02
IV.MTRZ.HNE. ML:2.8 0.004125 1.44 AML other m 2023-04-22T22:56:10.02
IV.MTRZ.HHN. ML:2.8 0.004385 0.2 AML other m 2023-04-22T22:56:10.44
IV.MTRZ.HNN. ML:2.8 0.004220000000000001 0.2 AML other m 2023-04-22T22:56:10.44
IV.SEI.HHN. ML:2.4 0.00122 0.18 AML other m 2023-04-22T22:56:10.89
IV.SEI.HHE. ML:2.1 0.0005955 1.52 AML other m 2023-04-22T22:56:11.01
IV.LMD.HHE. ML:2.0 0.0004185 0.3 AML other m 2023-04-22T22:56:11.64
IV.LMD.HHN. ML:2.0 0.0004395 0.86 AML other m 2023-04-22T22:56:12.85
IV.FNVD.HHE. ML:2.0 0.000391 1.06 AML other m 2023-04-22T22:56:12.02
IV.FNVD.HHN. ML:2.1 0.000522 0.5 AML other m 2023-04-22T22:56:13.28
IV.VMGN.HHE. ML:1.4 0.00009725 0.54 AML other m 2023-04-22T22:56:14.09
IV.VMGN.HHN. ML:1.6 0.00013550000000000001 0.44 AML other m 2023-04-22T22:56:14.57
IV.BOSL.HHN. ML:1.4 0.00008025 0.88 AML other m 2023-04-22T22:56:14.47
IV.BOSL.HHE. ML:1.4 0.000079 0.28 AML other m 2023-04-22T22:56:14.93
IV.SFI.EHN. ML:1.7 0.0001088 0.38 AML other m 2023-04-22T22:56:17.78
IV.MPPT.EHN. ML:1.4 0.00007155 0.58 AML other m 2023-04-22T22:56:19.29
IV.SFI.EHE. ML:1.9 0.00017299999999999998 1.14 AML other m 2023-04-22T22:56:19.24
IV.ZCCA.HHE. ML:1.4 0.00006515 0.48 AML other m 2023-04-22T22:56:20.49
IV.MPPT.EHE. ML:1.4 0.00006825 0.94 AML other m 2023-04-22T22:56:20.69
IV.ZCCA.HHN. ML:1.4 0.00007895 0.38 AML other m 2023-04-22T22:56:22.25
IV.CRMI.HHE. ML:1.2 0.000028499999999999998 1.58 AML other m 2023-04-22T22:56:22.84
IV.CRMI.HHN. ML:1.5 0.00005395 0.58 AML other m 2023-04-22T22:56:23.65
GU.POPM.HHN. ML:1.7 0.00010055 0.56 AML other m 2023-04-22T22:56:23.64
GU.POPM.HHE. ML:1.7 0.0000899 1.22 AML other m 2023-04-22T22:56:25.30
IV.BDI.HHE. ML:1.8 0.00009765 0.3 AML other m 2023-04-22T22:56:26.76
IV.BDI.HHN. ML:1.9 0.00010994999999999999 0.36 AML other m 2023-04-22T22:56:27.14
GU.GSCL.HHN. ML:1.6 0.0000567 0.58 AML other m 2023-04-22T22:56:27.41
IV.OSSC.HHE. ML:1.7 0.00005885 0.22 AML other m 2023-04-22T22:56:27.62
GU.GSCL.HHE. ML:1.5 0.00005025 1.44 AML other m 2023-04-22T22:56:30.80
IV.OSSC.HHN. ML:1.4 0.00003655 1.56 AML other m 2023-04-22T22:56:32.79
IV.PARC.HHN. ML:1.6 0.00004165 1.36 AML other m 2023-04-22T22:56:33.23
IV.PARC.HHE. ML:1.6 0.0000424 0.4 AML other m 2023-04-22T22:56:36.21
IV.ZOVE.EHE. ML:2.3 0.0001315 1.68 AML other m 2023-04-22T22:56:41.05
IV.ZOVE.EHN. ML:2.2 0.00009855 1.14 AML other m 2023-04-22T22:56:43.30
IV.ROVR.HHN. ML:2.4 0.00011949999999999999 0.72 AML other m 2023-04-22T22:56:49.37
OX.MARN.HHN. ML:2.2 0.00006840000000000001 0.26 AML other m 2023-04-22T22:56:49.33
IV.ROVR.HHE. ML:2.2 0.00007485 0.26 AML other m 2023-04-22T22:56:49.38
OX.MARN.HHE. ML:2.1 0.0000558 0.42 AML other m 2023-04-22T22:56:52.24
ST.DOSS.HHE. ML:2.4 0.0000849 0.4 AML other m 2023-04-22T22:56:53.61
ST.VARA.EHN. ML:2.4 0.0000925 1 AML other m 2023-04-22T22:56:54.86
IV.MAGA.HHE. ML:2.8 0.0002245 0.64 AML other m 2023-04-22T22:56:55.13
IV.MAGA.HHN. ML:2.5 0.0001185 0.28 AML other m 2023-04-22T22:56:56.50
ST.VARA.EHE. ML:2.5 0.00011399999999999999 1.3 AML other m 2023-04-22T22:56:57.13
SI.LUSI.HHN. ML:2.6 0.00011649999999999999 0.62 AML other m 2023-04-22T22:56:58.36
ST.DOSS.HHN. ML:2.2 0.000053750000000000005 0.44 AML other m 2023-04-22T22:56:59.74
SI.LUSI.HHE. ML:2.2 0.000046150000000000004 1.28 AML other m 2023-04-22T22:56:59.27
IV.CTI.HHE. ML:2.2 0.00004355000000000001 1.22 AML other m 2023-04-22T22:57:02.38
IV.CTI.HHN. ML:2.1 0.0000346 0.22 AML other m 2023-04-22T22:57:04.38
NI.POLC.HHN. ML:2.2 0.00004545000000000001 0.44 AML other m 2023-04-22T22:57:11.78
NI.POLC.HHE. ML:2.1 0.00003635 0.48 AML other m 2023-04-22T22:57:14.95
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