Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 23-04-2023 and time 03:52:20 (Italy) in region 5 km W Castel del Rio (BO)

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

  • 23-04-2023 01:52:20 (UTC)
  • 23-04-2023 03:52:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2350, 11.4520 at 19 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 9 1943 3189
Monghidoro BO 11 3749 6938
Monterenzio BO 11 6035 12973
Loiano BO 11 4294 17267
Borgo Tossignano BO 12 3288 20555
Casola Valsenio RA 14 2617 23172
Firenzuola FI 14 4726 27898
Casalfiumanese BO 15 3438 31336
Monzuno BO 15 6328 37664
Palazzuolo sul Senio FI 16 1154 38818
San Benedetto Val di Sambro BO 18 4315 43133
Pianoro BO 19 17460 60593
Dozza BO 20 6652 67245

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km SW of Imola (69797 inhabitants)
30 Km SE of Bologna (386663 inhabitants)
35 Km W of Faenza (58541 inhabitants)
47 Km W of Forlì (117913 inhabitants)
48 Km NE of Prato (191150 inhabitants)
54 Km NE of Firenze (382808 inhabitants)
54 Km NE of Pistoia (90315 inhabitants)
57 Km NE of Scandicci (50609 inhabitants)
62 Km SE of Modena (184973 inhabitants)
63 Km W of Ravenna (159116 inhabitants)
64 Km W of Cesena (96758 inhabitants)
68 Km S of Ferrara (133155 inhabitants)
76 Km SE of Carpi (70699 inhabitants)
83 Km SE of Reggio nell'Emilia (171345 inhabitants)
87 Km E of Lucca (89046 inhabitants)
91 Km W of Rimini (147750 inhabitants)
92 Km NW of Arezzo (99543 inhabitants)
97 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 2023-04-23
01:52:20		 44.2352 11.4517 19 2024-03-01
17:18:05		 Bollettino Sismico Italiano INGV 116953821
Reviewed
Rev100 		ML 1.7 2023-04-23
01:52:21		 44.2183 11.4642 19 2023-04-23
02:02:14		 Sala Sismica INGV-Roma 116629701
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-23 01:52:20 ± 0.11
Latitude 44.2352 ± 0.0063
Longitude 11.4517 ± 0.0100
Depth (km) 19 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 116953821

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 790
Semi-minor axis of confidence ellipse (meter) 77
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 270
Circular confidence region, given by single value of horizontal uncertainty (meter) 790.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 55
Number of associated phases, regardless of their use for origin computation 48
Number of defining phases 48
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.43
Epicentral distance of station closest to the epicenter (degree) 0.04766
Epicentral distance of station farthest from the epicenter (degree) 1.70601
Number of stations at which the event was observed 35
Number of stations from which data was used for origin computation 35
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 59
Type of magnitude ML
Reference to an origin 116953821
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-02-09 10:49:09

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 59
Type of magnitude ML
Reference to an origin 116629701
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-23 02:02:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ROVR.HHZ. 2023-04-23T01:53:05.70 0.6 undecidable manual S 349 159.4182 54 0.26 35
IV.ZOVE.EHZ. 2023-04-23T01:52:58.85 0.6 undecidable manual S 1 135.1647 94 -0.68 34
IV.CSP1.EHZ. 2023-04-23T01:52:51.38 0.3 undecidable manual P 131 189.366 54 1.02 35
IV.MAGA.HHZ. 2023-04-23T01:52:50.34 0.3 undecidable manual P 340 182.6838 54 0.83 39
ST.DOSS.HHZ. 2023-04-23T01:52:48.42 0.6 undecidable manual P 354 183.6828 54 -1.23 21
IV.ATCC.EHZ. 2023-04-23T01:52:46.81 0.3 undecidable manual P 140 150.4383 54 1.3 37
IV.ROVR.HHZ. 2023-04-23T01:52:46.34 0.3 undecidable manual P 349 159.4182 54 -0.28 52
IV.ZOVE.EHZ. 2023-04-23T01:52:42.63 0.3 undecidable manual P 1 135.1647 94 -0.58 52
IV.MPAG.EHZ. 2023-04-23T01:52:41.11 0.3 undecidable manual P 122 124.2867 94 -0.41 56
IV.CRMI.HHZ. 2023-04-23T01:52:40.29 0.6 undecidable manual S 218 61.5939 100 0.29 43
IV.CAFI.HHZ. 2023-04-23T01:52:39.43 0.3 undecidable manual P 158 108.6135 95 0.31 59
GU.EQUI.HHZ. 2023-04-23T01:52:39.16 0.3 undecidable manual P 266 103.5186 95 0.81 50
IV.SFI.EHZ. 2023-04-23T01:52:37.13 0.3 undecidable manual S 139 48.3183 103 0.61 62
IV.SSP9.EHZ. 2023-04-23T01:52:36.41 0.3 undecidable manual P 143 91.242 96 -0.05 64
IV.PARC.HHZ. 2023-04-23T01:52:35.80 0.3 undecidable manual P 136 90.4428 96 -0.54 57
IV.OSSC.HHZ. 2023-04-23T01:52:35.34 0.3 undecidable manual P 192 80.6637 97 0.51 60
IV.CSNT.HHZ. 2023-04-23T01:52:35.66 0.3 undecidable manual P 189 85.5477 96 0.08 65
IV.PII.HHZ. 2023-04-23T01:52:35.56 0.6 undecidable manual P 233 93.3399 96 -1.22 29
IV.CRE.HHZ. 2023-04-23T01:52:34.83 0.3 undecidable manual P 150 79.1652 97 0.22 64
IV.MOCL.EHN. 2023-04-23T01:52:33.06 0.6 undecidable manual S 220 33.4443 111 0.36 45
IV.BOSL.HHZ. 2023-04-23T01:52:33.28 0.3 undecidable manual S 190 34.3434 110 0.36 67
IV.BDI.HHZ. 2023-04-23T01:52:33.79 0.3 undecidable manual P 255 70.7736 98 0.47 61
IV.CRMI.HHZ. 2023-04-23T01:52:32.64 0.3 undecidable manual P 218 61.5939 100 0.71 57
IV.VMGN.HHZ. 2023-04-23T01:52:32.84 0.3 undecidable manual S 168 31.746 112 0.55 65
IV.LMD.HHZ. 2023-04-23T01:52:31.17 0.6 undecidable manual S 131 26.8509 117 0.08 48
GU.POPM.HHZ. 2023-04-23T01:52:31.55 0.3 undecidable manual P 249 59.1963 100 -0.01 69
IV.FNVD.HHZ. 2023-04-23T01:52:31.70 0.6 undecidable manual S 254 27.1506 116 0.53 43
IV.IMOL.EHZ. 2023-04-23T01:52:31.70 0.6 undecidable manual S 59 26.9508 117 0.6 42
4P.IT09A.HHN. 2023-04-23T01:52:30.30 0.6 undecidable manual P 358 47.2194 103 0.55 41
IV.SEI.HHZ. 2023-04-23T01:52:30.08 0.6 undecidable manual S 200 21.3675 124 0.25 47
IV.BRSN.EHZ. 2023-04-23T01:52:30.78 0.1 undecidable manual P 84 50.2164 102 0.57 83
IV.RUFI.EHE. 2023-04-23T01:52:29.21 0.3 undecidable manual P 174 44.3223 104 -0.11 70
IV.SFI.EHZ. 2023-04-23T01:52:29.28 0.1 undecidable manual P 139 48.3183 103 -0.64 80
IV.FIU.EHZ. 2023-04-23T01:52:29.52 1.0 undecidable manual P 4 45.0216 104 0.09 23
IV.MPPT.EHZ. 2023-04-23T01:52:28.41 0.3 undecidable manual P 223 42.1245 105 -0.59 63
IV.ZCCA.HHZ. 2023-04-23T01:52:28.91 0.3 undecidable manual P 289 39.8268 107 0.25 68
IV.MTRZ.HHZ. 2023-04-23T01:52:28.86 0.3 undecidable manual S 346 8.88 151 1.31 45
IV.VMGN.HHZ. 2023-04-23T01:52:27.15 0.1 undecidable manual P 168 31.746 112 -0.33 90
IT.FAZ.HNE. 2023-04-23T01:52:27.91 0.6 undecidable manual P 79 35.5422 109 -0.12 47
IV.MOCL.EHN. 2023-04-23T01:52:27.09 0.1 undecidable manual P 220 33.4443 111 -0.63 83
IV.VISG.HHN. 2023-04-23T01:52:27.08 0.3 undecidable manual S 195 5.2947 162 -0.09 76
IV.BOSL.HHZ. 2023-04-23T01:52:27.71 0.1 undecidable manual P 190 34.3434 110 -0.13 94
IV.IMOL.EHZ. 2023-04-23T01:52:26.37 0.1 undecidable manual P 59 26.9508 117 -0.43 90
IV.LMD.HHZ. 2023-04-23T01:52:26.08 0.1 positive manual P 131 26.8509 117 -0.7 81
IV.FNVD.HHZ. 2023-04-23T01:52:26.09 0.1 undecidable manual P 254 27.1506 116 -0.75 81
IV.SEI.HHZ. 2023-04-23T01:52:25.62 0.1 positive manual P 200 21.3675 124 -0.44 90
IV.MTRZ.HHZ. 2023-04-23T01:52:24.65 0.1 negative manual P 346 8.88 151 -0.09 100
IV.VISG.HHN. 2023-04-23T01:52:24.03 0.1 positive manual P 195 5.2947 162 -0.49 92
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRZ.HNE. ML:2.6 0.0033250000000000003 0.56 AML other m 2023-04-23T01:52:29.72
IV.MTRZ.HHE. ML:2.6 0.003485 0.56 AML other m 2023-04-23T01:52:29.72
IV.MTRZ.HHN. ML:2.6 0.003205 0.22 AML other m 2023-04-23T01:52:30.14
IV.MTRZ.HNN. ML:2.6 0.0030949999999999997 0.22 AML other m 2023-04-23T01:52:30.14
IV.SEI.HHN. ML:2.3 0.001053 0.2 AML other m 2023-04-23T01:52:30.58
IV.SEI.HHE. ML:2.0 0.0005035 0.42 AML other m 2023-04-23T01:52:30.70
IV.LMD.HHE. ML:1.9 0.000376 0.3 AML other m 2023-04-23T01:52:31.33
IV.LMD.HHN. ML:1.9 0.000397 0.84 AML other m 2023-04-23T01:52:32.54
IV.FNVD.HHE. ML:1.8 0.00027 0.94 AML other m 2023-04-23T01:52:32.71
IV.FNVD.HHN. ML:1.9 0.00036199999999999996 0.5 AML other m 2023-04-23T01:52:32.96
IV.VMGN.HHE. ML:1.3 0.00008649999999999999 1.46 AML other m 2023-04-23T01:52:33.78
IV.VMGN.HHN. ML:1.4 0.0001111 0.56 AML other m 2023-04-23T01:52:34.26
IV.BOSL.HHN. ML:1.3 0.00006835000000000001 0.9 AML other m 2023-04-23T01:52:34.16
IV.BOSL.HHE. ML:1.3 0.00006775000000000001 0.28 AML other m 2023-04-23T01:52:34.62
IV.SFI.HNN. ML:1.5 0.000079106085 0.3504 AML other m 2023-04-23T01:52:38.25
IV.SFI.EHE. ML:1.8 0.000145 1.38 AML other m 2023-04-23T01:52:38.92
IV.MPPT.EHN. ML:1.2 0.00005155 0.58 AML other m 2023-04-23T01:52:38.98
IV.ZCCA.HHN. ML:1.3 0.00005840000000000001 0.42 AML other m 2023-04-23T01:52:39.68
IV.SFI.EHN. ML:1.6 0.00008754999999999999 1.3 AML other m 2023-04-23T01:52:39.84
IV.ZCCA.HHE. ML:1.2 0.000051000000000000006 1.54 AML other m 2023-04-23T01:52:40.95
IV.IMOL.HNE. ML:1.9 0.00038332935 0.3792 AML other m 2023-04-23T01:52:40.47
IV.MPPT.EHE. ML:1.3 0.0000551 1.06 AML other m 2023-04-23T01:52:40.38
IV.IMOL.HNN. ML:1.9 0.00038305305 0.3808 AML other m 2023-04-23T01:52:40.29
IV.BRSN.HNE. ML:1.9 0.0002081251 0.2112 AML other m 2023-04-23T01:52:41.57
IV.BRSN.EHE. ML:1.8 0.00017050000000000002 0.18 AML other m 2023-04-23T01:52:41.56
IV.BRSN.HNN. ML:1.9 0.00019320388500000001 0.1808 AML other m 2023-04-23T01:52:42.46
IV.CRMI.HHN. ML:1.3 0.00004165 0.58 AML other m 2023-04-23T01:52:43.63
GU.POPM.HHN. ML:1.6 0.00008175000000000001 0.56 AML other m 2023-04-23T01:52:43.34
IV.CRMI.HHE. ML:1.0 0.0000215 1.64 AML other m 2023-04-23T01:52:44.88
IV.BDI.HHE. ML:1.7 0.00008400000000000001 0.32 AML other m 2023-04-23T01:52:46.46
IV.BDI.HHN. ML:1.8 0.0000908 0.48 AML other m 2023-04-23T01:52:46.83
IV.OSSC.HHE. ML:1.6 0.00005069999999999999 0.22 AML other m 2023-04-23T01:52:47.20
IV.BRSN.EHN. ML:1.9 0.0001865 1.46 AML other m 2023-04-23T01:52:47.73
GU.POPM.HHE. ML:1.6 0.00006905 1.38 AML other m 2023-04-23T01:52:47.77
IV.CSNT.HHN. ML:1.5 0.00003345 0.44 AML other m 2023-04-23T01:52:48.57
IV.CSNT.HHE. ML:1.4 0.000030150000000000004 0.48 AML other m 2023-04-23T01:52:48.72
IV.PII.HHE. ML:1.7 0.00005365 1.18 AML other m 2023-04-23T01:52:51.73
IV.OSSC.HHN. ML:1.4 0.000034 0.44 AML other m 2023-04-23T01:52:51.48
IV.PII.HHN. ML:1.8 0.00005855 0.5 AML other m 2023-04-23T01:52:52.71
IV.PARC.HHN. ML:1.5 0.00003315 0.64 AML other m 2023-04-23T01:52:52.92
IV.CRE.HHN. ML:1.6 0.00006085 0.42 AML other m 2023-04-23T01:52:53.43
IV.PARC.HHE. ML:1.5 0.000034200000000000005 0.72 AML other m 2023-04-23T01:52:55.70
IV.CRE.HHE. ML:1.5 0.00004425 1.2 AML other m 2023-04-23T01:52:55.22
GU.EQUI.HHN. ML:1.3 0.000017899999999999998 0.8 AML other m 2023-04-23T01:52:56.08
GU.EQUI.HHE. ML:1.4 0.00002395 0.76 AML other m 2023-04-23T01:52:57.43
IV.CAFI.HHE. ML:1.6 0.000035799999999999996 0.42 AML other m 2023-04-23T01:52:58.70
IV.CAFI.HHN. ML:1.5 0.00002525 0.98 AML other m 2023-04-23T01:52:59.29
IV.ZOVE.EHE. ML:2.3 0.00010805000000000001 0.32 AML other m 2023-04-23T01:53:00.74
IV.MPAG.EHN. ML:1.5 0.000020700000000000002 0.5 AML other m 2023-04-23T01:53:03.13
IV.ZOVE.EHN. ML:2.1 0.00008015 0.86 AML other m 2023-04-23T01:53:03.56
IV.MPAG.EHE. ML:1.5 0.0000201 0.42 AML other m 2023-04-23T01:53:06.75
IV.ROVR.HHN. ML:2.3 0.00008985 0.9 AML other m 2023-04-23T01:53:08.06
IV.ROVR.HHE. ML:2.1 0.0000565 0.26 AML other m 2023-04-23T01:53:09.07
IV.ATCC.EHE. ML:2.0 0.0000454 1.06 AML other m 2023-04-23T01:53:10.46
ST.DOSS.HHE. ML:2.3 0.000066 0.4 AML other m 2023-04-23T01:53:13.31
IV.MAGA.HHE. ML:2.7 0.00017649999999999998 1.36 AML other m 2023-04-23T01:53:15.83
IV.MAGA.HHN. ML:2.4 0.00008685000000000001 0.26 AML other m 2023-04-23T01:53:16.20
IV.ATCC.EHN. ML:1.8 0.0000329 1.38 AML other m 2023-04-23T01:53:17.93
ST.DOSS.HHN. ML:2.1 0.0000446 0.44 AML other m 2023-04-23T01:53:19.43
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