Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 04-12-2023 and time 02:50:09 (UTC) in region 4 km S Meldola (FC)

A magnitude ML 1.8 earthquake occured in region: 4 km S Meldola (FC), on

  • 04-12-2023 02:50:09 (UTC)
  • 04-12-2023 03:50:09 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.0920, 12.0680 at 19 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Meldola FC 4 9970 9970
Predappio FC 7 6346 16316
Bertinoro FC 8 11059 27375
Forlimpopoli FC 12 13290 40665
Castrocaro Terme e Terra del Sole FC 13 6426 47091
Civitella di Romagna FC 14 3786 50877
Cesena FC 15 96758 147635
Forlì FC 15 117913 265548
Dovadola FC 15 1653 267201
Galeata FC 16 2516 269717
Mercato Saraceno FC 18 6886 276603
Rocca San Casciano FC 18 1910 278513
Montiano FC 19 1716 280229
Sarsina FC 20 3446 283675

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km S of Forlì (117913 inhabitants)
15 Km W of Cesena (96758 inhabitants)
26 Km SE of Faenza (58541 inhabitants)
38 Km S of Ravenna (159116 inhabitants)
40 Km W of Rimini (147750 inhabitants)
41 Km SE of Imola (69797 inhabitants)
71 Km W of Pesaro (94582 inhabitants)
71 Km N of Arezzo (99543 inhabitants)
73 Km SE of Bologna (386663 inhabitants)
74 Km E of Firenze (382808 inhabitants)
80 Km E of Scandicci (50609 inhabitants)
81 Km W of Fano (60888 inhabitants)
81 Km E of Prato (191150 inhabitants)
90 Km SE of Ferrara (133155 inhabitants)
94 Km E of Pistoia (90315 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
Reviewed
Rev100 		ML 1.8 2023-12-04
02:50:09		 44.0922 12.0683 19 2023-12-04
02:58:00		 Sala Sismica INGV-Roma 123791251
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-12-04 02:50:09 ± 0.12
Latitude 44.0922 ± 0.0063
Longitude 12.0683 ± 0.0088
Depth (km) 19 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 123791251

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 719
Semi-minor axis of confidence ellipse (meter) 189
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 76
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) 117
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.86605
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 21
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.4
Num. used stations 59
Type of magnitude ML
Reference to an origin 123791251
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-12-04 02:58:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CDRU.HHZ. 2023-12-04T02:51:28.00 3.0 undecidable manual Pg 12.98 0
OX.PLRO.HHZ. 2023-12-04T02:51:21.22 3.0 undecidable manual Sn -3.25 0
OX.PLRO.HHZ. 2023-12-04T02:50:56.87 3.0 undecidable manual Pg 5.24 0
OX.SABO.HNZ. 2023-12-04T02:50:52.01 3.0 negative manual Pg 5.56 0
IV.SMA1.EHZ. 2023-12-04T02:50:40.15 3.0 positive manual Pg 0.8 0
IV.ZOVE.EHZ. 2023-12-04T02:50:34.14 3.0 undecidable manual Pg -1.66 0
IV.PE3.EHZ. 2023-12-04T02:50:28.26 0.6 undecidable manual S 142 55.6998 101 0.96 36
IV.CRE.HHZ. 2023-12-04T02:50:27.62 0.6 undecidable manual S 190 53.3022 101 0.94 37
IV.PARC.HHZ. 2023-12-04T02:50:26.80 0.6 undecidable manual S 164 51.0156 102 0.71 41
IV.RUFI.EHZ. 2023-12-04T02:50:26.33 0.6 undecidable manual S 238 52.8027 102 -0.21 47
IV.VMGN.HHZ. 2023-12-04T02:50:25.11 0.6 undecidable manual S 251 45.4212 104 0.5 44
IV.ARVD.HHZ. 2023-12-04T02:50:25.90 0.6 undecidable manual P 133 96.126 96 -0.16 43
IV.SSFR.HHZ. 2023-12-04T02:50:25.24 1.0 positive manual P 142 92.5407 96 -0.27 21
IV.RINC.EHZ. 2023-12-04T02:50:24.37 0.6 undecidable manual S 238 43.3233 105 0.29 46
IV.CAFI.HHZ. 2023-12-04T02:50:24.29 1.0 undecidable manual P 186 85.0482 97 -0.07 23
IV.ATPI.EHZ. 2023-12-04T02:50:22.96 0.6 positive manual P 159 76.0683 97 -0.02 46
IV.MPAG.EHZ. 2023-12-04T02:50:22.93 1.0 negative manual P 133 75.4689 98 0.03 23
IV.NARO.HHZ. 2023-12-04T02:50:21.32 1.0 undecidable manual P 142 67.2771 99 -0.33 22
IV.PIEI.HHZ. 2023-12-04T02:50:21.67 0.6 undecidable manual P 149 72.1722 98 -0.72 38
IV.PE3.EHZ. 2023-12-04T02:50:20.08 0.3 positive manual P 142 55.6998 101 0.19 70
IV.SFI.EHZ. 2023-12-04T02:50:20.23 0.6 undecidable manual S 220 27.2505 116 0.17 49
IV.VISG.HHZ. 2023-12-04T02:50:19.21 1.0 undecidable manual P 282 51.6039 102 -0.06 24
IV.CRE.HHZ. 2023-12-04T02:50:19.23 0.6 negative manual P 190 53.3022 101 -0.3 46
IV.BRSN.EHZ. 2023-12-04T02:50:19.57 0.6 undecidable manual S 3 21.3675 124 0.9 39
IV.VMGN.HHZ. 2023-12-04T02:50:18.15 0.6 negative manual P 251 45.4212 104 -0.19 48
IV.PARC.HHZ. 2023-12-04T02:50:18.85 0.1 negative manual P 164 51.0156 102 -0.34 91
IV.RUFI.EHZ. 2023-12-04T02:50:18.94 1.0 positive manual P 238 52.8027 102 -0.51 22
IV.RSM2.HHE. 2023-12-04T02:50:17.06 0.6 undecidable manual P 120 34.6431 110 0.31 47
IV.RINC.EHZ. 2023-12-04T02:50:17.73 0.3 undecidable manual P 238 43.3233 105 -0.3 70
IV.CPGN.HNE. 2023-12-04T02:50:17.91 1.0 undecidable manual P 148 38.0286 108 0.66 21
IV.IMOL.EHZ. 2023-12-04T02:50:17.85 0.6 negative manual P 319 39.3273 107 0.41 45
IT.MCS.HGN. 2023-12-04T02:50:16.57 0.6 undecidable manual S 164 11.3775 145 -0.19 50
IV.SFI.EHZ. 2023-12-04T02:50:15.33 0.3 undecidable manual P 220 27.2505 116 -0.38 71
IT.MOG.HNE. 2023-12-04T02:50:15.34 0.3 undecidable manual P 290 25.5522 118 -0.12 75
IV.BRSN.EHZ. 2023-12-04T02:50:14.74 0.1 negative manual P 3 21.3675 124 -0.17 100
IT.MCS.HGN. 2023-12-04T02:50:13.40 0.3 undecidable manual P 164 11.3775 145 -0.4 72
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BRSN.EHN. ML:1.9 0.00043490905 0.1808 AML other m 2023-12-04T02:50:20.51
IV.SFI.EHN. ML:1.8 0.00030177415000000004 0.1792 AML other m 2023-12-04T02:50:20.76
IV.SFI.EHE. ML:1.8 0.00029499999999999996 0.26 AML other m 2023-12-04T02:50:20.88
IV.BRSN.EHE. ML:1.6 0.0002295 0.32 AML other m 2023-12-04T02:50:21.58
IV.CRE.HHE. ML:3.2 0.00340629 0.52 AML other m 2023-12-04T02:50:21.89
IV.RINC.EHE. ML:1.8 0.00020559509999999997 0.28 AML other m 2023-12-04T02:50:25.15
IV.VMGN.HHN. ML:1.3 0.00006164766 0.5008 AML other m 2023-12-04T02:50:28.08
IV.RINC.EHN. ML:1.6 0.0001079 0.88 AML other m 2023-12-04T02:50:25.51
IV.VMGN.HHE. ML:1.4 0.0000639 1.08 AML other m 2023-12-04T02:50:25.97
IV.PARC.HHN. ML:1.4 0.000055159634999999995 0.1792 AML other m 2023-12-04T02:50:27.60
IV.PARC.HHE. ML:1.4 0.00006745000000000001 0.2 AML other m 2023-12-04T02:50:27.96
IV.VISG.HHE. ML:1.0 0.00002685 1.04 AML other m 2023-12-04T02:50:28.94
IV.CRE.HHN. ML:1.8 0.000134 0.26 AML other m 2023-12-04T02:50:28.89
IV.VISG.HHN. ML:1.1 0.0000314 0.44 AML other m 2023-12-04T02:50:29.72
IV.PE3.EHN. ML:1.8 0.00014500000000000003 0.56 AML other m 2023-12-04T02:50:29.94
IV.PE3.EHE. ML:1.7 0.00010365000000000001 0.5 AML other m 2023-12-04T02:50:29.98
IV.ATPI.EHE. ML:1.4 0.0000406 0.62 AML other m 2023-12-04T02:50:35.57
IV.CAFI.HHE. ML:1.5 0.0000395 1.42 AML other m 2023-12-04T02:50:37.91
IV.ATPI.EHN. ML:1.5 0.000048849999999999995 1.5 AML other m 2023-12-04T02:50:37.99
IV.CAFI.HHN. ML:1.4 0.00003035 0.42 AML other m 2023-12-04T02:50:38.02
IV.MPAG.EHE. ML:1.4 0.00003881106 0.3008 AML other m 2023-12-04T02:50:38.82
IV.MPAG.EHN. ML:1.6 0.000057374395000000004 0.52 AML other m 2023-12-04T02:50:38.79
OX.PLRO.HHE. ML:2.3 0.00002625 0.86 AML other m 2023-12-04T02:51:22.67
OX.PLRO.HHN. ML:2.6 0.0000495359895 0.0592 AML other m 2023-12-04T02:51:39.80
IV.BRSN.HNE. ML:2.0 0.0005429302 2.0992 AML other m 2023-12-04T02:50:26.87
IV.BRSN.HNN. ML:1.9 0.00042661360000000005 0.4 AML other m 2023-12-04T02:50:20.22
IV.SFI.HNE. ML:1.8 0.00032002790000000005 0.2688 AML other m 2023-12-04T02:50:20.88
IV.SFI.HNN. ML:1.8 0.00031747255000000004 0.1888 AML other m 2023-12-04T02:50:20.76
IV.IMOL.HNE. ML:1.8 0.0001851506 3.5104 AML other m 2023-12-04T02:50:32.27
IV.IMOL.HNN. ML:1.9 0.00023298615 3.1696 AML other m 2023-12-04T02:50:37.04
IV.IMOL.EHE. ML:1.8 0.00022574775000000003 19.2192 AML other m 2023-12-04T02:50:38.65
IV.IMOL.EHN. ML:1.8 0.00020833375999999997 19.8192 AML other m 2023-12-04T02:50:38.94
IV.RUFI.EHE. ML:1.3 0.0000491428175 15.8592 AML other m 2023-12-04T02:50:28.23
IV.RUFI.EHN. ML:1.4 0.000057638729999999996 4.72 AML other m 2023-12-04T02:50:31.59
IV.NARO.HHE. ML:1.3 0.000034631669999999994 0.4992 AML other m 2023-12-04T02:50:37.61
IV.NARO.HHN. ML:1.2 0.00002800445 0.76 AML other m 2023-12-04T02:50:31.87
IV.PIEI.HHE. ML:1.4 0.000037526635 0.36 AML other m 2023-12-04T02:50:33.96
IV.PIEI.HHN. ML:1.2 0.000025967245 0.1792 AML other m 2023-12-04T02:50:34.07
IV.PIEI.HNE. ML:2.0 0.0001401676 1.2304 AML other m 2023-12-04T02:50:22.03
IV.PIEI.HNN. ML:1.9 0.00012576795000000002 1.72 AML other m 2023-12-04T02:50:37.66
IV.MPAG.HNE. ML:2.2 0.0002168438 0.7904 AML other m 2023-12-04T02:50:35.65
IV.MPAG.HNN. ML:2.3 0.0002706398 2.1696 AML other m 2023-12-04T02:50:44.69
IV.ATPI.HNE. ML:2.1 0.0001924246535 6.7296 AML other m 2023-12-04T02:50:52.24
IV.ATPI.HNN. ML:2.2 0.0002065549 1.2608 AML other m 2023-12-04T02:50:49.30
IV.CAFI.HNE. ML:1.6 0.0000523190485 11.0112 AML other m 2023-12-04T02:50:57.31
IV.CAFI.HNN. ML:1.7 0.0000607344305 11.8912 AML other m 2023-12-04T02:50:57.81
IV.SSFR.HNE. ML:2.2 0.00015706500000000001 1.7104 AML other m 2023-12-04T02:50:43.09
IV.SSFR.HNN. ML:2.3 0.0002421816 1.12 AML other m 2023-12-04T02:50:45.12
IV.SSFR.HHN. ML:1.7 0.000056670860000000004 0.2384 AML other m 2023-12-04T02:50:44.92
IV.ARVD.HHN. ML:1.5 0.000031354505 0.52 AML other m 2023-12-04T02:50:43.15
IV.ARVD.HHE. ML:1.6 0.000045102435 2.04 AML other m 2023-12-04T02:50:54.06
IV.ZOVE.EHE. ML:2.6 0.0002001484 6.24 AML other m 2023-12-04T02:51:18.79
IV.ZOVE.EHN. ML:1.9 0.000035132875 0.5616 AML other m 2023-12-04T02:51:01.50
IV.ZOVE.HNE. ML:3.4 0.0010623686000000002 13.8496 AML other m 2023-12-04T02:50:39.72
IV.ZOVE.HNN. ML:3.4 0.0011747751 13.1184 AML other m 2023-12-04T02:50:39.76
IV.SMA1.EHN. ML:2.2 0.000046676059999999996 2.4992 AML other m 2023-12-04T02:50:53.56
IV.SMA1.EHE. ML:2.2 0.000045662285 2.16 AML other m 2023-12-04T02:51:15.56
OX.PLRO.HNE. ML:3.0 0.00015542639999999999 3.92 AML other m 2023-12-04T02:51:34.56
OX.PLRO.HNN. ML:3.1 0.0001586916 1.5392 AML other m 2023-12-04T02:51:17.19
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