Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 31-01-2018 and time 22:51:34 (UTC) in region 6 km E Monterenzio (BO)

A magnitude ML 1.7 earthquake occured in region: 6 km E Monterenzio (BO), on

  • 31-01-2018 22:51:34 (UTC)
  • 31-01-2018 23:51:34 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.3170, 11.4760 at 7 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 9 1943 7978
Borgo Tossignano BO 10 3288 11266
Casalfiumanese BO 11 3438 14704
Castel del Rio BO 12 1246 15950
Castel San Pietro Terme BO 13 20811 36761
Pianoro BO 13 17460 54221
Dozza BO 13 6652 60873
Loiano BO 13 4294 65167
Ozzano dell'Emilia BO 14 13596 78763
Casola Valsenio RA 16 2617 81380
Monghidoro BO 17 3749 85129
Monzuno BO 17 6328 91457
San Lazzaro di Savena BO 18 32065 123522
Imola BO 20 69797 193319

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km W of Imola (69797 inhabitants)
23 Km SE of Bologna (386663 inhabitants)
33 Km W of Faenza (58541 inhabitants)
46 Km W of Forlì (117913 inhabitants)
57 Km SE of Modena (184973 inhabitants)
57 Km NE of Prato (191150 inhabitants)
59 Km W of Ravenna (159116 inhabitants)
59 Km S of Ferrara (133155 inhabitants)
62 Km NE of Pistoia (90315 inhabitants)
63 Km N of Firenze (382808 inhabitants)
64 Km W of Cesena (96758 inhabitants)
66 Km NE of Scandicci (50609 inhabitants)
70 Km SE of Carpi (70699 inhabitants)
79 Km SE of Reggio nell'Emilia (171345 inhabitants)
88 Km SW of Rovigo (51867 inhabitants)
92 Km W of Rimini (147750 inhabitants)
94 Km NE of Lucca (89046 inhabitants)
100 Km NW of Arezzo (99543 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 2018-01-31
22:51:34		 44.3167 11.4757 7 2019-04-24
14:49:30		 Bollettino Sismico Italiano INGV 56415461
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-01-31 22:51:34 ± 0.14
Latitude 44.3167 ± 0.0063
Longitude 11.4757 ± 0.0113
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 56415461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 838
Semi-minor axis of confidence ellipse (meter) 347
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 273
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) 86
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 17
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) 0.58816
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 56415461
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-05-03 06:58:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MTMR.EHZ. 2018-01-31T22:53:19.41 3.0 undecidable manual Sg 16.709999 0
IV.TDS.HHZ. 2018-01-31T22:52:51.66 3.0 negative manual Pn 8.94 0
IV.PTRJ.HNZ. 2018-01-31T22:52:49.10 3.0 undecidable manual Sn 0.25 0
IV.MCRV.HHZ. 2018-01-31T22:52:39.94 3.0 undecidable manual Pg 16.870001 0
IV.LRP.EHZ. 2018-01-31T22:52:38.12 3.0 undecidable manual Sn 6.2 0
IV.MSSA.HHZ. 2018-01-31T22:52:17.91 3.0 undecidable manual Sn -0.32 0
IV.MF5.EHZ. 2018-01-31T22:52:12.45 3.0 undecidable manual Sg 1.28 0
IV.MTRA.EHZ. 2018-01-31T22:52:10.19 3.0 undecidable manual S -1.97 0
IV.EL6.EHZ. 2018-01-31T22:52:05.13 3.0 undecidable manual Sg 1.78 0
IV.MMUR.HNZ. 2018-01-31T22:52:01.52 3.0 undecidable manual Sg 0.06 0
IV.SFI.EHZ. 2018-01-31T22:51:52.53 0.3 undecidable manual S 147 54.4011 50 0.57 67
IV.MOCL.EHZ. 2018-01-31T22:51:48.60 0.3 undecidable manual S 214 41.8248 50 0.01 74
IV.FERS.HNN. 2018-01-31T22:51:46.59 0.3 undecidable manual P 4 65.2902 50 0.5 66
IV.FIU.EHN. 2018-01-31T22:51:46.06 0.3 undecidable manual S 2 35.9418 101 -0.78 63
IV.LMD.HHZ. 2018-01-31T22:51:46.13 0.3 undecidable manual S 145 32.3454 103 0.52 67
IV.SEI.HHZ. 2018-01-31T22:51:45.43 0.3 undecidable manual S 198 30.5472 103 0.4 69
IV.SFI.EHZ. 2018-01-31T22:51:43.77 0.3 undecidable manual P 147 54.4011 50 -0.65 61
IV.RUFI.EHZ. 2018-01-31T22:51:43.67 0.3 undecidable manual P 177 53.2023 50 -0.56 64
IV.CMPO.HNN. 2018-01-31T22:51:42.69 0.3 undecidable manual P 42 39.2274 50 0.6 66
IV.ZCCA.HNN. 2018-01-31T22:51:42.53 0.3 undecidable manual P 276 39.8268 50 0.37 70
IV.BRIS.HHZ. 2018-01-31T22:51:42.95 0.3 undecidable manual S 114 25.2525 106 -0.29 74
IV.MOCL.EHZ. 2018-01-31T22:51:42.12 0.3 undecidable manual P 214 41.8248 50 -0.36 69
IV.FIU.EHN. 2018-01-31T22:51:41.92 0.3 undecidable manual P 2 35.9418 101 0.46 69
IV.SEI.HHZ. 2018-01-31T22:51:40.06 0.1 negative manual P 198 30.5472 103 -0.36 97
IV.LMD.HHZ. 2018-01-31T22:51:40.30 0.3 undecidable manual P 145 32.3454 103 -0.46 70
IV.FNVD.HHZ. 2018-01-31T22:51:40.85 0.1 undecidable manual P 240 32.5452 103 0.05 100
IV.BRIS.HHZ. 2018-01-31T22:51:39.43 0.3 undecidable manual P 114 25.2525 106 0.04 77
IV.FAEN.HNZ. 2018-01-31T22:51:26.18 3.0 undecidable manual P 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHN. ML:2.0 0.000448 0.38 AML other m 2018-01-31T22:51:46.75
IV.BRIS.HHN. ML:1.6 0.000255 0.28 AML other m 2018-01-31T22:51:46.61
IV.LMD.HHE. ML:1.9 0.00033299999999999996 0.28 AML other m 2018-01-31T22:51:46.65
IV.MOCL.EHE. ML:1.7 0.00016999999999999999 0.34 AML other m 2018-01-31T22:51:49.43
IV.MOCL.EHN. ML:1.8 0.00023349999999999998 0.3 AML other m 2018-01-31T22:51:49.45
IV.BRIS.HHE. ML:1.6 0.000256 0.74 AML other m 2018-01-31T22:51:52.59
IV.SFI.EHN. ML:1.6 0.00009705 1.5 AML other m 2018-01-31T22:51:52.87
IV.RUFI.EHE. ML:1.4 0.000058450000000000005 0.28 AML other m 2018-01-31T22:51:55.39
IV.RUFI.EHN. ML:1.5 0.00007439999999999999 0.76 AML other m 2018-01-31T22:51:55.39
IV.SFI.EHE. ML:1.5 0.0000753 0.94 AML other m 2018-01-31T22:51:55.96
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