Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 09-12-2023 and time 12:10:41 (UTC) in region 5 km S Meldola (FC)

A magnitude ML 1.6 earthquake occured in region: 5 km S Meldola (FC), on

  • 09-12-2023 12:10:41 (UTC)
  • 09-12-2023 13:10:41 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.0890, 12.0760 at 21 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 5 9970 9970
Predappio FC 8 6346 16316
Bertinoro FC 8 11059 27375
Forlimpopoli FC 12 13290 40665
Castrocaro Terme e Terra del Sole FC 14 6426 47091
Civitella di Romagna FC 14 3786 50877
Cesena FC 14 96758 147635
Forlì FC 15 117913 265548
Dovadola FC 16 1653 267201
Galeata FC 17 2516 269717
Mercato Saraceno FC 18 6886 276603
Montiano FC 18 1716 278319
Rocca San Casciano FC 19 1910 280229
Sarsina FC 20 3446 283675

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km W of Cesena (96758 inhabitants)
15 Km S of Forlì (117913 inhabitants)
27 Km SE of Faenza (58541 inhabitants)
38 Km S of Ravenna (159116 inhabitants)
39 Km W of Rimini (147750 inhabitants)
41 Km SE of Imola (69797 inhabitants)
70 Km W of Pesaro (94582 inhabitants)
71 Km N of Arezzo (99543 inhabitants)
74 Km SE of Bologna (386663 inhabitants)
75 Km E of Firenze (382808 inhabitants)
80 Km W of Fano (60888 inhabitants)
80 Km E of Scandicci (50609 inhabitants)
82 Km E of Prato (191150 inhabitants)
91 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 1.6 2023-12-09
12:10:41		 44.0888 12.0763 21 2023-12-09
12:18:09		 Sala Sismica INGV-Roma 123917721
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-12-09 12:10:41 ± 0.17
Latitude 44.0888 ± 0.0063
Longitude 12.0763 ± 0.0100
Depth (km) 21 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 123917721

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 855
Semi-minor axis of confidence ellipse (meter) 164
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 244
Circular confidence region, given by single value of horizontal uncertainty (meter) 860.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 132
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.85885
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 123917721
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-12-09 12:18:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GRI.EHZ. 2023-12-09T12:12:11.34 3.0 negative manual Pn -1.09 0
GU.BURY.HHZ. 2023-12-09T12:12:11.79 3.0 undecidable manual Sn -0.5 0
IV.ACER.HHZ. 2023-12-09T12:11:59.47 3.0 undecidable manual Pg 12.09 0
GU.RNCA.HHZ. 2023-12-09T12:11:45.95 3.0 undecidable manual Sn -1.84 0
IV.CERA.HNZ. 2023-12-09T12:11:36.15 3.0 undecidable manual Pg 9.34 0
IV.MMO1.EHZ. 2023-12-09T12:11:31.26 3.0 undecidable manual Sg 2.57 0
IV.CSP1.EHZ. 2023-12-09T12:11:05.53 3.0 negative manual P 0.4 0
IV.PIEI.HHZ. 2023-12-09T12:11:03.82 0.6 undecidable manual S 149 71.4729 99 0.54 43
IV.RUFI.EHZ. 2023-12-09T12:10:59.18 0.6 undecidable manual S 239 53.1024 103 0.72 40
IV.ARVD.HHZ. 2023-12-09T12:10:58.27 0.3 negative manual P 133 95.3379 97 0.54 61
IV.VMGN.HHZ. 2023-12-09T12:10:56.93 0.6 undecidable manual S 251 45.8208 106 0.35 46
IV.CAFI.HHZ. 2023-12-09T12:10:56.30 0.6 negative manual P 186 84.7485 98 0.2 44
IV.MPAG.EHZ. 2023-12-09T12:10:54.52 0.6 undecidable manual P 133 74.7696 99 -0.06 46
IV.PIEI.HHZ. 2023-12-09T12:10:53.79 1.0 positive manual P 149 71.4729 99 -0.3 22
IV.LMD.HHZ. 2023-12-09T12:10:52.67 0.1 undecidable manual S 268 29.4483 117 0.19 98
IV.SFI.EHZ. 2023-12-09T12:10:52.32 0.3 undecidable manual S 222 27.4503 119 0.32 72
IT.MOG.HNN. 2023-12-09T12:10:51.87 0.3 undecidable manual S 290 26.2515 120 0.14 74
IV.BRSN.HNE. 2023-12-09T12:10:51.33 0.3 undecidable manual S 1 21.6672 126 0.62 67
IV.CRE.HHZ. 2023-12-09T12:10:51.14 0.3 positive manual P 191 53.1024 103 -0.16 71
IV.RUFI.EHZ. 2023-12-09T12:10:50.90 1.0 undecidable manual P 239 53.1024 103 -0.41 23
IV.VMGN.HHZ. 2023-12-09T12:10:50.01 0.6 negative manual P 251 45.8208 106 -0.21 48
IT.MCS.HGE. 2023-12-09T12:10:48.63 0.3 undecidable manual S 167 10.878 148 -0.09 77
IV.LMD.HHZ. 2023-12-09T12:10:47.36 0.1 undecidable manual P 268 29.4483 117 -0.49 93
IT.MOG.HNN. 2023-12-09T12:10:47.20 0.1 undecidable manual P 290 26.2515 120 -0.22 99
IV.SFI.EHZ. 2023-12-09T12:10:47.27 0.1 negative manual P 222 27.4503 119 -0.31 96
IV.BRSN.HNE. 2023-12-09T12:10:46.65 0.1 undecidable manual P 1 21.6672 126 -0.18 100
IT.MCS.HGE. 2023-12-09T12:10:45.31 0.1 undecidable manual P 167 10.878 148 -0.37 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SFI.EHN. ML:1.7 0.00023249999999999999 0.4 AML other m 2023-12-09T12:10:52.61
IV.SFI.HNE. ML:1.8 0.00027100000000000003 0.7 AML other m 2023-12-09T12:10:52.73
IV.SFI.EHE. ML:1.7 0.00021300000000000003 0.26 AML other m 2023-12-09T12:10:52.73
IV.SFI.HNN. ML:1.8 0.000308 0.9 AML other m 2023-12-09T12:10:52.86
IV.LMD.HHE. ML:2.0 0.000439 0.24 AML other m 2023-12-09T12:10:52.88
IV.LMD.HHN. ML:2.0 0.000388 0.22 AML other m 2023-12-09T12:10:52.97
IV.VMGN.HHN. ML:1.2 0.000046899999999999995 1.26 AML other m 2023-12-09T12:10:57.31
IV.VMGN.HHE. ML:1.2 0.000044 1.1 AML other m 2023-12-09T12:10:57.27
IV.CAFI.HHN. ML:1.3 0.00002385 1.24 AML other m 2023-12-09T12:11:03.03
IV.CAFI.HHE. ML:1.4 0.0000332 0.5 AML other m 2023-12-09T12:11:07.05
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