Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 16-08-2020 and time 23:24:05 (UTC) in region 4 km S Ozzano dell'Emilia (BO)

A magnitude ML 1.5 earthquake occured in region: 4 km S Ozzano dell'Emilia (BO), on

  • 16-08-2020 23:24:05 (UTC)
  • 17-08-2020 01:24:05 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.4110, 11.4690 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
Ozzano dell'Emilia BO 4 13596 13596
San Lazzaro di Savena BO 8 32065 45661
Castel San Pietro Terme BO 10 20811 66472
Pianoro BO 10 17460 83932
Monterenzio BO 11 6035 89967
Castenaso BO 11 14925 104892
Bologna BO 14 386663 491555
Dozza BO 14 6652 498207
Budrio BO 15 18412 516619
Medicina BO 16 16739 533358
Granarolo dell'Emilia BO 16 11910 545268
Casalecchio di Reno BO 17 36327 581595
Castel Guelfo di Bologna BO 17 4455 586050
Casalfiumanese BO 17 3438 589488
Borgo Tossignano BO 18 3288 592776
Sasso Marconi BO 18 14735 607511
Fontanelice BO 18 1943 609454
Loiano BO 19 4294 613748

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km SE of Bologna (386663 inhabitants)
21 Km W of Imola (69797 inhabitants)
36 Km W of Faenza (58541 inhabitants)
49 Km S of Ferrara (133155 inhabitants)
50 Km W of Forlì (117913 inhabitants)
50 Km SE of Modena (184973 inhabitants)
58 Km W of Ravenna (159116 inhabitants)
62 Km SE of Carpi (70699 inhabitants)
66 Km NE of Prato (191150 inhabitants)
69 Km W of Cesena (96758 inhabitants)
69 Km NE of Pistoia (90315 inhabitants)
73 Km N of Firenze (382808 inhabitants)
74 Km E of Reggio nell'Emilia (171345 inhabitants)
76 Km NE of Scandicci (50609 inhabitants)
78 Km SW of Rovigo (51867 inhabitants)
96 Km W of Rimini (147750 inhabitants)
100 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 1.5 2020-08-16
23:24:05		 44.4108 11.4688 27 2020-11-19
12:37:04		 Bollettino Sismico Italiano INGV 83625161
Reviewed
Rev100 		ML 1.3 2020-08-16
23:24:04		 44.4177 11.4955 32 2020-08-16
23:33:39		 Sala Sismica INGV-Roma 82061781
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-16 23:24:05 ± 0.44
Latitude 44.4108 ± 0.0108
Longitude 11.4688 ± 0.0353
Depth (km) 27 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 83625161

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2204
Semi-minor axis of confidence ellipse (meter) 1753
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 282
Circular confidence region, given by single value of horizontal uncertainty (meter) 2200.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 103
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.38
Epicentral distance of station closest to the epicenter (degree) 0.10252
Epicentral distance of station farthest from the epicenter (degree) 0.36512
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:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 82061781
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-16 23:33:39

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 83625161
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-10-08 17:48:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SEI.HHZ. 2020-08-16T23:24:20.10 0.6 undecidable manual S 193 40.5261 118 0.11 52
IV.FNVD.HHZ. 2020-08-16T23:24:19.62 0.6 undecidable manual S 226 38.4282 120 0.1 52
IV.VISG.HHZ. 2020-08-16T23:24:16.19 0.6 undecidable manual S 186 24.753 133 -0.37 49
IV.FIU.EHZ. 2020-08-16T23:24:16.46 0.6 undecidable manual S 4 25.5522 132 -0.24 52
IV.MTRZ.HHZ. 2020-08-16T23:24:14.43 0.6 undecidable manual S 198 11.3775 155 -0.01 54
IV.ZCCA.HHN. 2020-08-16T23:24:14.91 0.6 undecidable manual P 261 39.627 119 1.13 36
IV.FNVD.HHZ. 2020-08-16T23:24:13.40 0.1 undecidable manual P 226 38.4282 120 -0.23 100
IV.SEI.HHZ. 2020-08-16T23:24:13.69 0.3 undecidable manual P 193 40.5261 118 -0.22 75
IV.IMOL.HNZ. 2020-08-16T23:24:12.44 0.3 undecidable manual P 105 22.4553 136 0.77 65
IV.BRIS.HHZ. 2020-08-16T23:24:12.63 0.3 undecidable manual P 131 31.3464 126 -0.08 79
IV.VISG.HHZ. 2020-08-16T23:24:11.57 0.1 undecidable manual P 186 24.753 133 -0.35 100
IV.FIU.EHZ. 2020-08-16T23:24:11.60 0.3 undecidable manual P 4 25.5522 132 -0.4 75
IV.MTRZ.HHZ. 2020-08-16T23:24:11.21 0.3 undecidable manual P 198 11.3775 155 0.51 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHN. ML:1.3 0.0000812 0.66 AML other m 2020-08-16T23:24:16.20
IV.MTRZ.HNE. ML:1.9 0.000375 0.52 AML other m 2020-08-16T23:24:17.19
IV.MTRZ.HHE. ML:1.9 0.000377 0.5 AML other m 2020-08-16T23:24:17.20
IV.MTRZ.HHN. ML:2.0 0.0005105 1.28 AML other m 2020-08-16T23:24:17.82
IV.MTRZ.HNN. ML:2.0 0.0004925000000000001 1.28 AML other m 2020-08-16T23:24:17.82
IV.VISG.HHE. ML:1.2 0.000059999999999999995 0.2 AML other m 2020-08-16T23:24:18.05
IV.SEI.HHN. ML:1.5 0.00009295000000000001 0.52 AML other m 2020-08-16T23:24:21.00
IV.FIU.EHE. ML:1.6 0.0001425 1.26 AML other m 2020-08-16T23:24:21.13
IV.SEI.HHE. ML:1.0 0.00003075 1.74 AML other m 2020-08-16T23:24:22.90
IV.BRIS.HHE. ML:1.1 0.000047350000000000006 0.58 AML other m 2020-08-16T23:24:22.17
IV.FIU.EHN. ML:1.7 0.00021100000000000003 1.46 AML other m 2020-08-16T23:24:23.85
IV.BRIS.HHN. ML:1.1 0.00004575 1.18 AML other m 2020-08-16T23:24:26.70
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