Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 19-11-2018 and time 00:07:21 (Italy) in region 5 km W Riolo Terme (RA)

A magnitude ML 1.8 earthquake occured in region: 5 km W Riolo Terme (RA), on

  • 18-11-2018 23:07:21 (UTC)
  • 19-11-2018 00:07:21 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.2660, 11.6630 at 22 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
Riolo Terme RA 5 5720 5720
Casalfiumanese BO 5 3438 9158
Casola Valsenio RA 6 2617 11775
Borgo Tossignano BO 6 3288 15063
Fontanelice BO 8 1943 17006
Brisighella RA 10 7639 24645
Imola BO 11 69797 94442
Dozza BO 11 6652 101094
Castel Bolognese RA 12 9554 110648
Castel del Rio BO 14 1246 111894
Castel San Pietro Terme BO 16 20811 132705
Modigliana FC 16 4560 137265
Faenza RA 18 58541 195806
Solarolo RA 18 4488 200294
Castel Guelfo di Bologna BO 19 4455 204749
Bagnara di Romagna RA 19 2429 207178
Mordano BO 19 4760 211938
Palazzuolo sul Senio FI 19 1154 213092

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km SW of Imola (69797 inhabitants)
18 Km W of Faenza (58541 inhabitants)
31 Km W of Forlì (117913 inhabitants)
36 Km SE of Bologna (386663 inhabitants)
46 Km W of Ravenna (159116 inhabitants)
48 Km W of Cesena (96758 inhabitants)
62 Km NE of Prato (191150 inhabitants)
64 Km S of Ferrara (133155 inhabitants)
64 Km NE of Firenze (382808 inhabitants)
68 Km NE of Scandicci (50609 inhabitants)
70 Km NE of Pistoia (90315 inhabitants)
72 Km SE of Modena (184973 inhabitants)
76 Km W of Rimini (147750 inhabitants)
84 Km SE of Carpi (70699 inhabitants)
90 Km S of Rovigo (51867 inhabitants)
91 Km N of Arezzo (99543 inhabitants)
95 Km SE of Reggio nell'Emilia (171345 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 1.8 2018-11-18
23:07:21		 44.2663 11.6632 22 2019-06-04
09:16:10		 Bollettino Sismico Italiano INGV 66023831
Reviewed
Rev100 		ML 1.7 2018-11-18
23:07:22		 44.2443 11.5837 9 2018-11-18
23:17:36		 Sala Sismica INGV-Roma 63189161
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-11-18 23:07:21 ± 0.32
Latitude 44.2663 ± 0.0126
Longitude 11.6632 ± 0.0163
Depth (km) 22 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 66023831

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1349
Semi-minor axis of confidence ellipse (meter) 860
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 124
Circular confidence region, given by single value of horizontal uncertainty (meter) 1350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 135
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.41
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.67989
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 63189161
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-11-18 23:17:36

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 66023831
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-04-23 09:13:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LAV9.HHZ. 2018-11-18T23:08:43.87 3.0 undecidable manual Sg 6.27 0
IV.MSSA.HHZ. 2018-11-18T23:08:15.10 3.0 undecidable manual Sg 0.34 0
IV.VIVA.HHZ. 2018-11-18T23:08:09.04 3.0 positive manual Pg 5.27 0
IV.ASQU.HHZ. 2018-11-18T23:07:39.17 0.6 undecidable manual S 169 53.1024 105 0.39 46
IV.RUFI.EHZ. 2018-11-18T23:07:38.48 0.6 undecidable manual S 195 49.1175 106 0.72 42
IV.FNVD.HHE. 2018-11-18T23:07:37.45 0.6 undecidable manual S 256 44.3223 108 0.91 40
IV.SFI.EHZ. 2018-11-18T23:07:36.70 0.3 undecidable manual S 160 42.7239 109 0.57 66
IV.CRE.HHZ. 2018-11-18T23:07:35.11 0.3 undecidable manual P 162 75.4689 100 0.14 69
IV.SEI.HHZ. 2018-11-18T23:07:34.00 0.6 undecidable manual S 226 33.744 115 0.08 51
IV.FAEN.HNZ. 2018-11-18T23:07:32.07 0.6 undecidable manual S 81 17.1717 136 1.78 24
IV.ASQU.HHZ. 2018-11-18T23:07:31.36 0.3 undecidable manual P 169 53.1024 105 -0.24 71
IV.RUFI.EHZ. 2018-11-18T23:07:30.84 0.3 undecidable manual P 195 49.1175 106 -0.16 72
IV.FNVD.HHE. 2018-11-18T23:07:30.25 0.6 undecidable manual P 256 44.3223 108 -0.05 49
IV.LMD.HHZ. 2018-11-18T23:07:30.40 0.6 undecidable manual S 170 21.2676 130 -0.68 44
IV.SFI.EHZ. 2018-11-18T23:07:29.91 0.1 undecidable manual P 160 42.7239 109 -0.16 98
IV.IMOL.EHZ. 2018-11-18T23:07:29.90 0.6 undecidable manual S 31 12.0768 147 0.45 49
IV.SEI.HHZ. 2018-11-18T23:07:28.64 0.6 undecidable manual P 226 33.744 115 -0.15 49
IV.BRIS.HHZ. 2018-11-18T23:07:28.83 0.3 undecidable manual S 119 9.4794 153 -0.26 76
IV.FAEN.HNZ. 2018-11-18T23:07:27.14 0.3 undecidable manual P 81 17.1717 136 0.45 72
IV.LMD.HHZ. 2018-11-18T23:07:26.62 0.1 positive manual P 170 21.2676 130 -0.53 93
IV.BRIS.HHZ. 2018-11-18T23:07:25.51 0.1 undecidable manual P 119 9.4794 153 -0.5 97
IV.IMOL.EHZ. 2018-11-18T23:07:25.90 0.1 undecidable manual P 31 12.0768 147 -0.31 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BRIS.HHE. ML:2.0 0.000716 1.74 AML other m 2018-11-18T23:07:28.89
IV.BRIS.HHN. ML:1.7 0.0003715 0.62 AML other m 2018-11-18T23:07:29.00
IV.IMOL.HNN. ML:2.4 0.00173 0.14 AML other m 2018-11-18T23:07:31.16
IV.IMOL.HNE. ML:2.2 0.0009469999999999999 0.14 AML other m 2018-11-18T23:07:31.25
IV.LMD.HHN. ML:1.9 0.0004365 0.6 AML other m 2018-11-18T23:07:31.33
IV.LMD.HHE. ML:1.6 0.000221 0.12 AML other m 2018-11-18T23:07:31.99
IV.SFI.EHN. ML:1.7 0.00014774999999999999 0.26 AML other m 2018-11-18T23:07:37.59
IV.SFI.EHE. ML:1.6 0.00011224999999999999 0.38 AML other m 2018-11-18T23:07:38.21
IV.ASQU.HHN. ML:1.5 0.00007450000000000001 1.24 AML other m 2018-11-18T23:07:40.30
IV.ASQU.HHE. ML:1.6 0.00008124999999999998 0.88 AML other m 2018-11-18T23:07:40.45
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