Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 04-12-2023 and time 15:49:55 (UTC) in region 9 km E Bagno di Romagna (FC)

A magnitude ML 0.9 earthquake occured in region: 9 km E Bagno di Romagna (FC), on

  • 04-12-2023 15:49:55 (UTC)
  • 04-12-2023 16:49:55 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.8510, 12.0840 at 10 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.

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
Bagno di Romagna FC 9 6026 6026
Verghereto FC 9 1907 7933
Casteldelci RN 9 407 8340
Sarsina FC 9 3446 11786
Sant'Agata Feltria RN 10 2151 13937
Pennabilli RN 15 2869 16806
Mercato Saraceno FC 15 6886 23692
Novafeltria RN 17 7164 30856
Talamello RN 17 1104 31960
Santa Sofia FC 18 4136 36096
Badia Tedalda AR 18 1087 37183
Maiolo RN 19 848 38031

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km SW of Cesena (96758 inhabitants)
42 Km S of Forlì (117913 inhabitants)
45 Km SW of Rimini (147750 inhabitants)
46 Km NE of Arezzo (99543 inhabitants)
51 Km SE of Faenza (58541 inhabitants)
63 Km SE of Imola (69797 inhabitants)
64 Km S of Ravenna (159116 inhabitants)
67 Km E of Firenze (382808 inhabitants)
67 Km W of Pesaro (94582 inhabitants)
73 Km E of Scandicci (50609 inhabitants)
75 Km W of Fano (60888 inhabitants)
79 Km E of Prato (191150 inhabitants)
85 Km NE of Siena (53903 inhabitants)
86 Km N of Perugia (166134 inhabitants)
93 Km SE of Bologna (386663 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 0.9 2023-12-04
15:49:55		 43.8508 12.0837 10 2023-12-04
16:05:09		 Sala Sismica INGV-Roma 123808661
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-12-04 15:49:55 ± 0.1
Latitude 43.8508 ± 0.0054
Longitude 12.0837 ± 0.0087
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 123808661

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 839
Semi-minor axis of confidence ellipse (meter) 287
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 235
Circular confidence region, given by single value of horizontal uncertainty (meter) 840.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 99
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 19
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) 0.52341
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 123808661
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-12-04 16:05:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATVO.HHZ. 2023-12-04T15:50:14.51 0.3 undecidable manual S 153 58.0974 50 0.8 61
IV.CSP1.EHZ. 2023-12-04T15:50:13.63 3.0 undecidable manual P -0.24 0
IV.ATPI.EHZ. 2023-12-04T15:50:11.98 0.6 undecidable manual S 150 51.2154 50 0.11 50
IV.NARO.HHZ. 2023-12-04T15:50:11.12 0.6 undecidable manual S 124 47.9187 50 0.14 50
IV.LMD.HHZ. 2023-12-04T15:50:08.78 0.3 undecidable manual S 310 39.1275 50 0.13 77
IV.BADI.EHZ. 2023-12-04T15:50:08.81 0.3 undecidable manual S 161 40.0266 50 -0.06 78
IV.CRE.HHZ. 2023-12-04T15:50:06.34 0.6 undecidable manual S 202 27.8499 109 0.75 44
IV.ATVO.HHZ. 2023-12-04T15:50:05.92 0.6 positive manual P 153 58.0974 50 -0.04 50
IV.ATPI.EHZ. 2023-12-04T15:50:04.45 1.0 undecidable manual P 150 51.2154 50 -0.45 23
IV.PARC.HHZ. 2023-12-04T15:50:04.60 0.6 undecidable manual S 151 25.6521 110 -0.27 51
IV.NARO.HHZ. 2023-12-04T15:50:03.98 0.3 negative manual P 124 47.9187 50 -0.41 71
IV.SFI.EHZ. 2023-12-04T15:50:03.10 0.3 undecidable manual S 288 19.869 116 0.09 80
IV.LMD.HHZ. 2023-12-04T15:50:02.63 0.6 negative manual P 310 39.1275 50 -0.42 48
IT.MCS.HGZ. 2023-12-04T15:50:02.22 0.6 undecidable manual S 7 15.9729 121 0.4 50
IV.BADI.EHZ. 2023-12-04T15:50:02.82 0.6 positive manual P 161 40.0266 50 -0.35 49
IV.CRE.HHZ. 2023-12-04T15:50:01.05 0.3 undecidable manual P 202 27.8499 109 -0.22 77
IV.PARC.HHZ. 2023-12-04T15:50:00.50 0.1 positive manual P 151 25.6521 110 -0.36 100
IV.CPGN.EHZ. 2023-12-04T15:50:00.22 0.3 undecidable manual P 106 19.7691 116 0.45 74
IT.MCS.HGZ. 2023-12-04T15:49:59.03 0.3 undecidable manual P 7 15.9729 121 -0.07 81
IV.SFI.EHZ. 2023-12-04T15:49:59.62 0.6 positive manual P 288 19.869 116 -0.17 53
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PARC.HHN. ML:1.2 0.00009795000000000001 0.2 AML other m 2023-12-04T15:50:04.96
IV.PARC.HHE. ML:0.9 0.0000444 1.36 AML other m 2023-12-04T15:50:04.22
IV.NARO.HHE. ML:1.0 0.000022850000000000003 1.04 AML other m 2023-12-04T15:50:11.73
IV.NARO.HHN. ML:1.0 0.0000305 0.34 AML other m 2023-12-04T15:50:11.95
IV.SFI.EHE. ML:0.7 0.000041842635 0.2432 AML other m 2023-12-04T15:50:03.17
IV.SFI.EHN. ML:0.8 0.0000485802 3.52 AML other m 2023-12-04T15:50:03.44
IV.CRE.HHE. ML:0.7 0.000025757589999999998 0.1152 AML other m 2023-12-04T15:50:07.61
IV.CRE.HHN. ML:0.8 0.000034123105 0.1152 AML other m 2023-12-04T15:50:07.21
IV.LMD.HHN. ML:0.9 0.00003168712 0.1152 AML other m 2023-12-04T15:50:09.06
IV.BADI.EHE. ML:1.1 0.00004500663 1.024 AML other m 2023-12-04T15:50:09.56
IV.ATPI.EHE. ML:0.6 0.0000111413275 1.6896 AML other m 2023-12-04T15:50:12.12
IV.ATPI.EHN. ML:0.9 0.00001853381 1.1136 AML other m 2023-12-04T15:50:12.17
IV.ATVO.HHE. ML:1.0 0.00002203236 0.4352 AML other m 2023-12-04T15:50:14.34
IV.ATVO.HHN. ML:0.8 0.000015112666 1.0112 AML other m 2023-12-04T15:50:15.23
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