Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 17-08-2020 and time 22:44:09 (UTC) in region 5 km S Ozzano dell'Emilia (BO)

A magnitude ML 1.7 earthquake occured in region: 5 km S Ozzano dell'Emilia (BO), on

  • 17-08-2020 22:44:09 (UTC)
  • 18-08-2020 00:44:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.3980, 11.4650 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 5 13596 13596
Monterenzio BO 9 6035 19631
San Lazzaro di Savena BO 9 32065 51696
Pianoro BO 10 17460 69156
Castel San Pietro Terme BO 10 20811 89967
Castenaso BO 12 14925 104892
Dozza BO 14 6652 111544
Bologna BO 15 386663 498207
Casalfiumanese BO 16 3438 501645
Budrio BO 17 18412 520057
Medicina BO 17 16739 536796
Borgo Tossignano BO 17 3288 540084
Casalecchio di Reno BO 17 36327 576411
Fontanelice BO 17 1943 578354
Sasso Marconi BO 17 14735 593089
Granarolo dell'Emilia BO 17 11910 604999
Castel Guelfo di Bologna BO 18 4455 609454
Loiano BO 18 4294 613748

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km SE of Bologna (386663 inhabitants)
21 Km W of Imola (69797 inhabitants)
36 Km W of Faenza (58541 inhabitants)
50 Km W of Forlì (117913 inhabitants)
50 Km S of Ferrara (133155 inhabitants)
51 Km SE of Modena (184973 inhabitants)
59 Km W of Ravenna (159116 inhabitants)
63 Km SE of Carpi (70699 inhabitants)
65 Km NE of Prato (191150 inhabitants)
68 Km NE of Pistoia (90315 inhabitants)
68 Km W of Cesena (96758 inhabitants)
72 Km N of Firenze (382808 inhabitants)
74 Km E of Reggio nell'Emilia (171345 inhabitants)
75 Km NE of Scandicci (50609 inhabitants)
79 Km SW of Rovigo (51867 inhabitants)
95 Km W of Rimini (147750 inhabitants)
98 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 1.7 2020-08-17
22:44:09		 44.3983 11.4647 27 2020-11-19
12:37:05		 Bollettino Sismico Italiano INGV 84152101
Reviewed
Rev100 		ML 1.6 2020-08-17
22:44:08		 44.3887 11.5018 34 2020-08-17
23:00:26		 Sala Sismica INGV-Roma 82099321
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-17 22:44:09 ± 0.27
Latitude 44.3983 ± 0.0090
Longitude 11.4647 ± 0.0189
Depth (km) 27 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 84152101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1252
Semi-minor axis of confidence ellipse (meter) 1033
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 303
Circular confidence region, given by single value of horizontal uncertainty (meter) 1250.0
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 26
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.93350
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 15
Type of magnitude ML
Reference to an origin 84152101
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-07 12:00:49

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 82099321
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-17 23:00:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MCRV.HHZ. 2020-08-17T22:45:27.94 3.0 undecidable manual Pg 13.28 0
IV.PAOL.HHZ. 2020-08-17T22:45:12.18 3.0 negative manual Pn 3.92 0
IV.LAV9.HHZ. 2020-08-17T22:44:51.65 3.0 undecidable manual Pn 0.04 0
IV.MF5.EHZ. 2020-08-17T22:44:46.99 3.0 negative manual Pg 6.71 0
IV.ZOVE.EHZ. 2020-08-17T22:44:43.42 3.0 undecidable manual Sg -0.2 0
NI.POLC.HHZ. 2020-08-17T22:44:38.80 3.0 negative manual Pg 0.32 0
IV.MBAL.EHZ. 2020-08-17T22:44:34.48 3.0 positive manual Pg 1.75 0
IV.ZOVE.EHZ. 2020-08-17T22:44:28.45 3.0 negative manual Pg -0.06 0
IV.CSNT.HHZ. 2020-08-17T22:44:27.12 0.1 undecidable manual P 188 103.6185 100 0.37 81
IV.SEI.HHZ. 2020-08-17T22:44:23.62 0.6 undecidable manual S 192 39.1275 119 0.44 46
IV.FNVD.HHZ. 2020-08-17T22:44:22.82 0.6 undecidable manual S 227 37.3293 120 0.06 49
IV.BRIS.HHZ. 2020-08-17T22:44:21.45 0.6 undecidable manual S 129 30.747 126 0.15 50
IV.IMOL.EHZ. 2020-08-17T22:44:20.42 0.3 undecidable manual S 101 22.4553 136 0.81 64
IV.FIU.EHZ. 2020-08-17T22:44:20.76 0.6 undecidable manual S 5 26.9508 130 0.27 49
IV.VISG.HHZ. 2020-08-17T22:44:19.57 0.6 undecidable manual S 186 23.3544 135 -0.22 48
IV.RONT.HHZ. 2020-08-17T22:44:18.06 0.1 undecidable manual P 183 45.0216 115 0 98
IV.MOCL.EHZ. 2020-08-17T22:44:18.95 0.1 undecidable manual P 207 49.1175 113 0.3 92
IV.MTRZ.HHZ. 2020-08-17T22:44:17.20 0.6 undecidable manual S 198 9.9789 157 -0.56 45
IV.ZCCA.HNZ. 2020-08-17T22:44:17.84 0.1 undecidable manual P 262 39.0276 119 0.59 85
IV.FNVD.HHZ. 2020-08-17T22:44:16.71 0.1 undecidable manual P 227 37.3293 120 -0.3 94
IV.SEI.HHZ. 2020-08-17T22:44:16.86 0.1 undecidable manual P 192 39.1275 119 -0.4 92
IV.FIU.EHZ. 2020-08-17T22:44:15.02 0.1 undecidable manual P 5 26.9508 130 -0.68 84
IV.BRIS.HHZ. 2020-08-17T22:44:15.75 0.1 positive manual P 129 30.747 126 -0.42 91
IV.IMOL.EHZ. 2020-08-17T22:44:15.78 0.6 undecidable manual P 101 22.4553 136 0.58 46
IV.MTRZ.HHZ. 2020-08-17T22:44:14.38 0.1 positive manual P 198 9.9789 157 0.25 100
IV.VISG.HHZ. 2020-08-17T22:44:14.83 0.1 positive manual P 186 23.3544 135 -0.47 92
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRZ.HNN. ML:1.8 0.00036129710000000004 0.832 AML other m 2020-08-17T22:44:20.50
IV.MTRZ.HHN. ML:1.8 0.0003665 0.84 AML other m 2020-08-17T22:44:20.50
IV.VISG.HHE. ML:1.2 0.0000669 1.42 AML other m 2020-08-17T22:44:20.74
IV.MTRZ.HHE. ML:1.8 0.000378 1.02 AML other m 2020-08-17T22:44:21.73
IV.BRIS.HHN. ML:0.9 0.000029107640000000002 0.32 AML other m 2020-08-17T22:44:22.52
IV.MTRZ.HNE. ML:1.9 0.00045092665 0.016 AML other m 2020-08-17T22:44:22.73
IV.FNVD.HHN. ML:1.5 0.00008845 0.08 AML other m 2020-08-17T22:44:23.22
IV.FNVD.HHE. ML:1.4 0.00007535 0.1 AML other m 2020-08-17T22:44:23.25
IV.SEI.HHN. ML:1.5 0.00009815 0.5 AML other m 2020-08-17T22:44:24.52
IV.SEI.HHE. ML:1.4 0.0000727 0.74 AML other m 2020-08-17T22:44:26.42
IV.BRIS.HHE. ML:1.3 0.00007515 1.02 AML other m 2020-08-17T22:44:26.00
IV.ZOVE.HNN. ML:2.2 0.00011984844 0.3328 AML other m 2020-08-17T22:44:44.47
IV.ZOVE.EHN. ML:2.1 0.00009825 0.18 AML other m 2020-08-17T22:44:44.48
IV.ZOVE.HNE. ML:2.1 0.000088534065 1.04 AML other m 2020-08-17T22:44:45.54
IV.ZOVE.EHE. ML:2.1 0.00009190000000000001 1.04 AML other m 2020-08-17T22:44:45.03
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