INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.9 on date 09-12-2018 and time 20:06:33 (Italy) in region 6 km N Castrocaro Terme e Terra del Sole (FC)

A magnitude ML 1.9 earthquake occured in region: 6 km N Castrocaro Terme e Terra del Sole (FC), on

  • 09-12-2018 19:06:33 (UTC)
  • 09-12-2018 20:06:33 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.24, 11.96 at 24 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Castrocaro Terme e Terra del Sole FC 6 6426 6426
Forlì FC 7 117913 124339
Faenza RA 8 58541 182880
Dovadola FC 14 1653 184533
Meldola FC 15 9970 194503
Forlimpopoli FC 15 13290 207793
Predappio FC 15 6346 214139
Brisighella RA 15 7639 221778
Castel Bolognese RA 16 9554 231332
Modigliana FC 16 4560 235892
Russi RA 17 12247 248139
Solarolo RA 17 4488 252627
Cotignola RA 17 7474 260101
Bertinoro FC 17 11059 271160
Riolo Terme RA 19 5720 276880

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km W of Forlì (117913 inhabitants)
8 Km SE of Faenza (58541 inhabitants)
23 Km SE of Imola (69797 inhabitants)
25 Km W of Cesena (96758 inhabitants)
28 Km SW of Ravenna (159116 inhabitants)
52 Km W of Rimini (147750 inhabitants)
57 Km SE of Bologna (386663 inhabitants)
72 Km SE of Ferrara (133155 inhabitants)
76 Km NE of Firenze (382808 inhabitants)
79 Km E of Prato (191150 inhabitants)
82 Km NE of Scandicci (50609 inhabitants)
85 Km W of Pesaro (94582 inhabitants)
86 Km N of Arezzo (99543 inhabitants)
90 Km E of Pistoia (90315 inhabitants)
94 Km E of Modena (184973 inhabitants)
94 Km S of Rovigo (51867 inhabitants)
95 Km W of Fano (60888 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 1.9 2018-12-09
19:06:33
44.23 11.96 24 2018-12-09
19:19:57
Sala Sismica INGV-Roma 63798071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-12-09 19:06:33 ± 0.16
Latitude 44.23 ± 0.01
Longitude 11.96 ± 0.01
Depth (km) 24 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 63798071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 626
Semi-minor axis of confidence ellipse (meter) 561
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 1
Circular confidence region, given by single value of horizontal uncertainty (meter) 630
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 98
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.07914
Epicentral distance of station farthest from the epicenter (degree) 0.75363
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 63798071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-12-09 19:19:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SEI.HHZ. 2018-12-09T19:06:50.43 0.3 undecidable manual S 247 0.4658 108 0.39 67
IV.BADI.EHE. 2018-12-09T19:06:48.08 0.1 undecidable manual P 164 0.7536 101 0.38 86
IV.MPPT.EHZ. 2018-12-09T19:06:46.46 0.6 undecidable manual P 246 0.6817 102 -0.03 47
IV.SFI.EHZ. 2018-12-09T19:06:46.40 0.3 undecidable manual S 194 0.339 116 -0.16 73
IV.PARC.HHN. 2018-12-09T19:06:45.80 0.1 undecidable manual P 161 0.6196 103 0.34 89
IV.CRE.HHN. 2018-12-09T19:06:45.80 0.6 undecidable manual P 180 0.6151 103 0.41 44
IV.LMD.HHZ. 2018-12-09T19:06:43.97 0.3 undecidable manual S 229 0.2383 127 -0.03 77
IV.CPGN.EHZ. 2018-12-09T19:06:43.47 0.6 undecidable manual P 149 0.5054 107 -0.11 47
IV.IMOL.EHZ. 2018-12-09T19:06:43.37 0.3 undecidable manual S 309 0.1979 133 0.29 73
IV.SEI.HHZ. 2018-12-09T19:06:42.90 0.3 undecidable manual P 247 0.4658 108 -0.03 73
IT.FAZ.HGZ. 2018-12-09T19:06:41.42 0.3 undecidable manual S 323 0.0791 158 0.4 73
IV.BRSN.EHZ. 2018-12-09T19:06:41.58 0.3 undecidable manual S 61 0.1007 152 0.28 75
IV.BLLA.EHZ. 2018-12-09T19:06:41.55 0.6 undecidable manual P 104 0.3786 113 0.02 50
IV.FAEN.HNN. 2018-12-09T19:06:41.08 0.3 undecidable manual S 313 0.0791 158 0.05 79
IV.BRIS.HHZ. 2018-12-09T19:06:41.84 0.3 undecidable manual S 266 0.1376 144 -0.02 78
IV.SFI.EHZ. 2018-12-09T19:06:40.75 0.1 undecidable manual P 194 0.339 116 -0.16 97
IV.LMD.HHZ. 2018-12-09T19:06:39.05 0.1 undecidable manual P 229 0.2383 127 -0.39 95
IV.IMOL.EHZ. 2018-12-09T19:06:39.14 0.3 undecidable manual P 309 0.1979 133 0.24 74
IV.BRSN.EHZ. 2018-12-09T19:06:37.47 0.1 undecidable manual P 61 0.1007 152 -0.41 96
IV.FAEN.HNN. 2018-12-09T19:06:37.46 0.1 undecidable manual P 313 0.0791 158 -0.26 100
IV.BRIS.HHZ. 2018-12-09T19:06:37.90 0.1 undecidable manual P 266 0.1376 144 -0.31 98
IT.FAZ.HGZ. 2018-12-09T19:06:37.47 0.1 undecidable manual P 323 0.0791 158 -0.25 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BRIS.HHE. ML:2 0.0006295 1.62 AML other m 2018-12-09T19:06:42.12
IV.BRSN.HNE. ML:2.7 0.00283 0.28 AML other m 2018-12-09T19:06:42.28
IV.BRSN.HNN. ML:2.8 0.003725 0.22 AML other m 2018-12-09T19:06:42.15
IV.BRSN.EHN. ML:2.9 0.0046 0.24 AML other m 2018-12-09T19:06:42.15
IV.BRIS.HHN. ML:1.8 0.000388 0.36 AML other m 2018-12-09T19:06:42.09
IV.BRSN.EHE. ML:2.5 0.002025 0.34 AML other m 2018-12-09T19:06:42.68
IV.LMD.HHN. ML:1.9 0.0003415 1.1 AML other m 2018-12-09T19:06:44.73
IV.LMD.HHE. ML:1.8 0.000248 0.62 AML other m 2018-12-09T19:06:44.57
IV.SEI.HHE. ML:1.8 0.00012735 1.5 AML other m 2018-12-09T19:06:52.85
IV.SEI.HHN. ML:2 0.000226 1.44 AML other m 2018-12-09T19:06:52.24
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download