Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 04-01-2018 and time 20:13:35 (UTC) in region 6 km E Monterenzio (BO)

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

  • 04-01-2018 20:13:35 (UTC)
  • 04-01-2018 21:13:35 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.3400, 11.4820 at 30 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
Castel San Pietro Terme BO 11 20811 26846
Fontanelice BO 11 1943 28789
Borgo Tossignano BO 11 3288 32077
Casalfiumanese BO 12 3438 35515
Ozzano dell'Emilia BO 12 13596 49111
Dozza BO 12 6652 55763
Pianoro BO 12 17460 73223
Castel del Rio BO 14 1246 74469
Loiano BO 15 4294 78763
San Lazzaro di Savena BO 16 32065 110828
Casola Valsenio RA 17 2617 113445
Monzuno BO 18 6328 119773
Imola BO 19 69797 189570
Monghidoro BO 19 3749 193319
Castel Guelfo di Bologna BO 19 4455 197774
Castenaso BO 19 14925 212699
Sasso Marconi BO 20 14735 227434
Medicina BO 20 16739 244173

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km W of Imola (69797 inhabitants)
21 Km SE of Bologna (386663 inhabitants)
33 Km W of Faenza (58541 inhabitants)
46 Km W of Forlì (117913 inhabitants)
56 Km SE of Modena (184973 inhabitants)
56 Km S of Ferrara (133155 inhabitants)
58 Km W of Ravenna (159116 inhabitants)
60 Km NE of Prato (191150 inhabitants)
64 Km NE of Pistoia (90315 inhabitants)
65 Km W of Cesena (96758 inhabitants)
66 Km N of Firenze (382808 inhabitants)
68 Km SE of Carpi (70699 inhabitants)
69 Km NE of Scandicci (50609 inhabitants)
78 Km SE of Reggio nell'Emilia (171345 inhabitants)
85 Km SW of Rovigo (51867 inhabitants)
92 Km W of Rimini (147750 inhabitants)
96 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 2018-01-04
20:13:35		 44.3398 11.4818 30 2019-04-24
14:49:25		 Bollettino Sismico Italiano INGV 55693941
Reviewed
Rev100 		ML 1.9 2018-01-04
20:13:35		 44.3338 11.4977 28 2018-01-04
20:19:52		 Sala Sismica INGV-Roma 53022381
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-01-04 20:13:35 ± 0.4
Latitude 44.3398 ± 0.0207
Longitude 11.4818 ± 0.0163
Depth (km) 30 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 55693941

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2068
Semi-minor axis of confidence ellipse (meter) 1195
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 12
Circular confidence region, given by single value of horizontal uncertainty (meter) 2070.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 207
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.04856
Epicentral distance of station farthest from the epicenter (degree) 0.50182
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 55693941
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-12-10 11:30:01

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 53022381
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-01-04 20:19:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SEI.HHZ. 2018-01-04T20:13:48.08 0.3 undecidable manual S 197 33.1446 127 -0.12 74
IV.LMD.HHZ. 2018-01-04T20:13:48.65 0.3 undecidable manual S 148 34.1436 126 0.24 71
IV.BRIS.HHZ. 2018-01-04T20:13:46.75 0.3 undecidable manual S 119 25.9518 135 0.01 76
IV.RUFI.EHE. 2018-01-04T20:13:45.92 0.3 undecidable manual P 178 55.6998 113 0.23 69
IV.ZCCA.HHZ. 2018-01-04T20:13:45.14 0.6 undecidable manual P 272 40.1265 121 1.59 27
IV.MOCL.EHZ. 2018-01-04T20:13:44.10 0.1 undecidable manual P 213 44.2224 119 0.01 98
IV.MTRZ.HHZ. 2018-01-04T20:13:44.15 0.3 undecidable manual S 237 5.3946 169 0.09 78
IV.FNVD.HHZ. 2018-01-04T20:13:42.59 0.3 undecidable manual P 236 34.3434 126 -0.21 72
IV.SEI.HHZ. 2018-01-04T20:13:42.34 0.1 undecidable manual P 197 33.1446 127 -0.32 94
IV.LMD.HHZ. 2018-01-04T20:13:42.68 0.1 undecidable manual P 148 34.1436 126 -0.11 98
IV.BRIS.HHZ. 2018-01-04T20:13:41.75 0.1 undecidable manual P 119 25.9518 135 -0.07 99
IV.MTRZ.HHZ. 2018-01-04T20:13:40.06 0.1 undecidable manual P 237 5.3946 169 -0.21 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRZ.HHE. ML:2.0 0.00052578455 0.4224 AML other m 2018-01-04T20:13:45.46
IV.MTRZ.HNE. ML:2.0 0.00050988705 0.256 AML other m 2018-01-04T20:13:45.47
IV.MTRZ.HNN. ML:2.0 0.00058619535 0.3712 AML other m 2018-01-04T20:13:45.37
IV.MTRZ.HHN. ML:2.0 0.00059280665 0.3712 AML other m 2018-01-04T20:13:45.37
IV.LMD.HHE. ML:1.5 0.00010212014999999999 0.2816 AML other m 2018-01-04T20:13:48.99
IV.BRIS.HHN. ML:1.3 0.000080961125 0.256 AML other m 2018-01-04T20:13:48.92
IV.BRIS.HNN. ML:2.0 0.00033703799999999995 0.2944 AML other m 2018-01-04T20:13:48.91
IV.LMD.HHN. ML:1.6 0.00011851685000000001 0.3456 AML other m 2018-01-04T20:13:49.08
IV.SEI.HHE. ML:1.9 0.00027672715 0.3584 AML other m 2018-01-04T20:13:49.09
IV.SEI.HHN. ML:1.9 0.00025831535 0.384 AML other m 2018-01-04T20:13:49.90
IV.MOCL.EHN. ML:1.2 0.000038540535000000004 0.2432 AML other m 2018-01-04T20:13:51.65
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