Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 15-06-2018 and time 03:11:12 (UTC) in region 3 km SW Riolo Terme (RA)

A magnitude ML 1.7 earthquake occured in region: 3 km SW Riolo Terme (RA), on

  • 15-06-2018 03:11:12 (UTC)
  • 15-06-2018 05:11:12 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2560, 11.6970 at 17 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.

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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
Riolo Terme RA 3 5720 5720
Casola Valsenio RA 7 2617 8337
Brisighella RA 7 7639 15976
Casalfiumanese BO 8 3438 19414
Borgo Tossignano BO 9 3288 22702
Castel Bolognese RA 11 9554 32256
Imola BO 11 69797 102053
Fontanelice BO 11 1943 103996
Dozza BO 13 6652 110648
Modigliana FC 13 4560 115208
Faenza RA 15 58541 173749
Castel del Rio BO 16 1246 174995
Solarolo RA 17 4488 179483
Castel San Pietro Terme BO 18 20811 200294
Bagnara di Romagna RA 18 2429 202723
Mordano BO 18 4760 207483
Castel Guelfo di Bologna BO 20 4455 211938
Palazzuolo sul Senio FI 20 1154 213092
Tredozio FC 20 1212 214304

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km S of Imola (69797 inhabitants)
15 Km W of Faenza (58541 inhabitants)
28 Km W of Forlì (117913 inhabitants)
39 Km SE of Bologna (386663 inhabitants)
44 Km W of Ravenna (159116 inhabitants)
46 Km W of Cesena (96758 inhabitants)
63 Km NE of Prato (191150 inhabitants)
65 Km NE of Firenze (382808 inhabitants)
65 Km S of Ferrara (133155 inhabitants)
69 Km NE of Scandicci (50609 inhabitants)
72 Km E of Pistoia (90315 inhabitants)
73 Km W of Rimini (147750 inhabitants)
75 Km SE of Modena (184973 inhabitants)
87 Km SE of Carpi (70699 inhabitants)
89 Km N of Arezzo (99543 inhabitants)
91 Km S of Rovigo (51867 inhabitants)
98 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 1.7 2018-06-15
03:11:12		 44.2562 11.697 17 2019-04-24
14:50:45		 Bollettino Sismico Italiano INGV 57837161
Reviewed
Rev100 		ML 1.6 2018-06-15
03:11:10		 44.1865 11.7012 11 2018-06-15
03:26:29		 Sala Sismica INGV-Roma 57829711
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-06-15 03:11:12 ± 0.16
Latitude 44.2562 ± 0.0072
Longitude 11.6970 ± 0.0100
Depth (km) 17 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 57837161

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 746
Semi-minor axis of confidence ellipse (meter) 486
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 170
Circular confidence region, given by single value of horizontal uncertainty (meter) 750.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 58
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
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) 0.05936
Epicentral distance of station farthest from the epicenter (degree) 0.52790
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 57829711
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-06-15 03:26:29

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 57837161
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-06-15 08:53:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASQU.HHZ. 2018-06-15T03:11:29.53 0.1 undecidable manual S 172 51.5151 98 0.61 80
IV.FNVD.HHE. 2018-06-15T03:11:28.37 0.1 undecidable manual S 258 46.7199 100 0.72 78
IV.RUFI.EHN. 2018-06-15T03:11:28.46 0.1 undecidable manual S 198 48.7179 99 0.27 89
IV.SFI.EHZ. 2018-06-15T03:11:26.44 0.1 undecidable manual S 163 40.7259 101 0.34 89
IV.BRSN.EHZ. 2018-06-15T03:11:24.36 0.3 undecidable manual S 84 30.6471 107 0.89 58
IV.MPPT.EHE. 2018-06-15T03:11:23.51 0.3 undecidable manual P 236 58.5969 97 0.4 64
IV.RUFI.EHN. 2018-06-15T03:11:21.05 0.1 undecidable manual P 198 48.7179 99 -0.56 86
IV.ASQU.HHZ. 2018-06-15T03:11:21.48 0.1 undecidable manual P 172 51.5151 98 -0.55 85
IV.MOCL.EHE. 2018-06-15T03:11:21.54 0.1 undecidable manual P 236 49.617 99 -0.21 92
IV.MTRZ.HHE. 2018-06-15T03:11:21.69 0.1 undecidable manual S 286 22.5552 116 0.24 95
IV.FIU.EHN. 2018-06-15T03:11:21.27 0.3 undecidable manual P 339 45.621 100 0.14 70
IV.FNVD.HHE. 2018-06-15T03:11:21.06 0.1 undecidable manual P 258 46.7199 100 -0.23 92
IV.LMD.HHZ. 2018-06-15T03:11:20.76 0.1 undecidable manual S 178 19.869 120 -0.06 100
IV.FAEN.HNZ. 2018-06-15T03:11:19.98 0.1 undecidable manual S 75 14.7741 130 0.27 97
IV.IMOL.EHZ. 2018-06-15T03:11:19.64 0.1 undecidable manual S 17 12.0768 137 0.46 94
IV.SFI.EHZ. 2018-06-15T03:11:19.77 1.0 undecidable manual P 163 40.7259 101 -0.63 21
IV.CMPO.HNN. 2018-06-15T03:11:19.69 0.3 undecidable manual P 13 37.0296 103 -0.14 71
IV.BRSN.EHZ. 2018-06-15T03:11:18.78 0.1 undecidable manual P 84 30.6471 107 -0.1 96
IV.BRIS.HHZ. 2018-06-15T03:11:18.26 0.1 undecidable manual S 122 6.5934 155 -0.1 100
IV.MTRZ.HHE. 2018-06-15T03:11:17.63 0.1 undecidable manual P 286 22.5552 116 -0.08 99
IV.FAEN.HNZ. 2018-06-15T03:11:16.80 0.3 undecidable manual P 75 14.7741 130 0.09 75
IV.LMD.HHZ. 2018-06-15T03:11:16.66 0.1 positive manual P 178 19.869 120 -0.69 85
IV.BRIS.HHZ. 2018-06-15T03:11:15.35 0.1 positive manual P 122 6.5934 155 -0.58 89
IV.IMOL.EHZ. 2018-06-15T03:11:15.77 0.1 negative manual P 17 12.0768 137 -0.63 86
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BRIS.HHN. ML:1.7 0.00050334 0.08 AML other m 2018-06-15T03:11:18.64
IV.BRIS.HNN. ML:1.7 0.00048596985 0.08 AML other m 2018-06-15T03:11:18.65
IV.BRIS.HNE. ML:1.9 0.00084181635 0.36 AML other m 2018-06-15T03:11:18.52
IV.BRIS.HHE. ML:2.0 0.0008806867999999999 0.36 AML other m 2018-06-15T03:11:18.52
IV.IMOL.HNN. ML:2.1 0.001084888 0.1504 AML other m 2018-06-15T03:11:21.07
IV.IMOL.HNE. ML:2.0 0.0007818403 0.2288 AML other m 2018-06-15T03:11:21.43
IV.LMD.HHE. ML:1.7 0.00031493895000000007 0.2208 AML other m 2018-06-15T03:11:20.90
IV.LMD.HHN. ML:1.6 0.00022083135 0.1408 AML other m 2018-06-15T03:11:21.57
IV.SFI.EHN. ML:1.5 0.00009811344999999999 0.3808 AML other m 2018-06-15T03:11:26.84
IV.SFI.EHE. ML:1.4 0.00007525404499999999 0.2816 AML other m 2018-06-15T03:11:26.88
IV.ASQU.HHN. ML:1.4 0.00005332435 0.52 AML other m 2018-06-15T03:11:30.54
IV.ASQU.HHE. ML:1.8 0.00015592665 0.44 AML other m 2018-06-15T03:11:29.94
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