Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 31-01-2018 and time 12:47:19 (UTC) in region 6 km E Monterenzio (BO)

A magnitude ML 1.8 earthquake occured in region: 6 km E Monterenzio (BO), on

  • 31-01-2018 12:47:19 (UTC)
  • 31-01-2018 13:47:19 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.3300, 11.4860 at 27 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
Monterenzio BO 6 6035 6035
Fontanelice BO 10 1943 7978
Borgo Tossignano BO 10 3288 11266
Casalfiumanese BO 11 3438 14704
Castel San Pietro Terme BO 11 20811 35515
Dozza BO 12 6652 42167
Ozzano dell'Emilia BO 13 13596 55763
Pianoro BO 13 17460 73223
Castel del Rio BO 13 1246 74469
Loiano BO 15 4294 78763
Casola Valsenio RA 16 2617 81380
San Lazzaro di Savena BO 17 32065 113445
Monzuno BO 18 6328 119773
Monghidoro BO 18 3749 123522
Imola BO 18 69797 193319
Castel Guelfo di Bologna BO 19 4455 197774
Castenaso BO 20 14925 212699
Riolo Terme RA 20 5720 218419

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km W of Imola (69797 inhabitants)
22 Km SE of Bologna (386663 inhabitants)
32 Km W of Faenza (58541 inhabitants)
46 Km W of Forlì (117913 inhabitants)
57 Km SE of Modena (184973 inhabitants)
57 Km S of Ferrara (133155 inhabitants)
58 Km W of Ravenna (159116 inhabitants)
59 Km NE of Prato (191150 inhabitants)
63 Km NE of Pistoia (90315 inhabitants)
64 Km W of Cesena (96758 inhabitants)
65 Km N of Firenze (382808 inhabitants)
68 Km NE of Scandicci (50609 inhabitants)
69 Km SE of Carpi (70699 inhabitants)
79 Km SE of Reggio nell'Emilia (171345 inhabitants)
86 Km S of Rovigo (51867 inhabitants)
91 Km W of Rimini (147750 inhabitants)
95 Km NE of Lucca (89046 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 2018-01-31
12:47:19		 44.3305 11.486 27 2019-04-24
14:49:30		 Bollettino Sismico Italiano INGV 56369281
Reviewed
Rev100 		ML 1.8 2018-01-31
12:47:19		 44.3373 11.4843 27 2018-01-31
13:00:45		 Sala Sismica INGV-Roma 53578821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-01-31 12:47:19 ± 0.14
Latitude 44.3305 ± 0.0054
Longitude 11.4860 ± 0.0075
Depth (km) 27 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 56369281

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 657
Semi-minor axis of confidence ellipse (meter) 134
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 314
Circular confidence region, given by single value of horizontal uncertainty (meter) 660.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 56
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.04676
Epicentral distance of station farthest from the epicenter (degree) 0.49912
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 53578821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-01-31 13:00:45

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 56369281
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-05-02 14:31:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MTCR.EHZ. 2018-01-31T12:47:36.38 0.3 undecidable manual S 229 51.0156 112 0.32 66
IV.MOCL.EHZ. 2018-01-31T12:47:33.96 0.3 undecidable manual S 214 43.5231 116 -0.26 66
IV.LMD.HHZ. 2018-01-31T12:47:32.12 0.3 undecidable manual S 148 33.1446 124 0.31 68
IV.SEI.HHZ. 2018-01-31T12:47:31.44 0.1 undecidable manual S 198 32.2455 125 -0.19 92
IV.BRIS.HNN. 2018-01-31T12:47:30.26 0.3 undecidable manual S 118 25.1526 132 0.12 71
IV.MTCR.EHZ. 2018-01-31T12:47:29.27 0.3 undecidable manual P 229 51.0156 112 0.36 65
IV.RUFI.EHZ. 2018-01-31T12:47:29.68 0.3 undecidable manual P 178 54.7008 110 0.25 67
IV.RAVA.EHZ. 2018-01-31T12:47:29.22 0.6 undecidable manual P 329 55.4001 110 -0.31 44
IV.CMPO.HNE. 2018-01-31T12:47:27.36 0.3 undecidable manual P 42 37.5291 120 0.33 66
IV.MOCL.EHZ. 2018-01-31T12:47:27.76 0.1 undecidable manual P 214 43.5231 116 -0.08 93
IV.MTRZ.HHZ. 2018-01-31T12:47:27.58 0.3 undecidable manual S 248 5.1948 168 0.18 73
IV.SEI.HHZ. 2018-01-31T12:47:26.10 0.1 undecidable manual P 198 32.2455 125 -0.24 91
IV.ZCCA.HNE. 2018-01-31T12:47:26.99 0.6 undecidable manual P 273 40.5261 118 -0.44 44
IV.FIU.EHN. 2018-01-31T12:47:26.86 0.6 undecidable manual P 1 34.3434 123 0.25 45
IV.LMD.HHZ. 2018-01-31T12:47:26.37 0.3 undecidable manual P 148 33.1446 124 -0.08 71
IV.FNVD.HHE. 2018-01-31T12:47:26.84 0.1 undecidable manual P 238 34.0437 123 0.27 91
IV.BRIS.HNN. 2018-01-31T12:47:25.44 0.3 undecidable manual P 118 25.1526 132 -0.05 73
IV.IMOL.EHE. 2018-01-31T12:47:24.46 0.1 undecidable manual P 81 20.5683 139 -0.53 89
IV.MTRZ.HHZ. 2018-01-31T12:47:23.82 0.1 positive manual P 248 5.1948 168 -0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOCL.EHE. ML:1.4 0.00007035 0.34 AML other m 2018-01-31T12:47:35.46
IV.MTRZ.HHN. ML:2.0 0.0005800000000000001 1.48 AML other m 2018-01-31T12:47:28.20
IV.MTRZ.HHE. ML:2.1 0.0006490000000000001 0.62 AML other m 2018-01-31T12:47:30.51
IV.MTRZ.HNE. ML:2.0 0.0006134999999999999 0.62 AML other m 2018-01-31T12:47:30.51
IV.LMD.HHE. ML:1.5 0.000105 1.2 AML other m 2018-01-31T12:47:32.60
IV.SEI.HHE. ML:1.8 0.0002205 1.66 AML other m 2018-01-31T12:47:32.01
IV.LMD.HHN. ML:1.6 0.00011895 1.64 AML other m 2018-01-31T12:47:32.03
IV.SEI.HHN. ML:2.1 0.0004445 1.06 AML other m 2018-01-31T12:47:33.60
IV.MOCL.EHN. ML:1.5 0.00008615000000000001 0.24 AML other m 2018-01-31T12:47:35.48
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