Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 18-08-2020 and time 00:56:56 (Italy) in region 5 km SW Ozzano dell'Emilia (BO)

A magnitude ML 1.5 earthquake occured in region: 5 km SW Ozzano dell'Emilia (BO), on

  • 17-08-2020 22:56:56 (UTC)
  • 18-08-2020 00:56:56 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.4070, 11.4540 at 23 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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
San Lazzaro di Savena BO 8 32065 45661
Pianoro BO 9 17460 63121
Monterenzio BO 10 6035 69156
Castel San Pietro Terme BO 11 20811 89967
Castenaso BO 12 14925 104892
Bologna BO 13 386663 491555
Dozza BO 15 6652 498207
Casalecchio di Reno BO 16 36327 534534
Budrio BO 16 18412 552946
Granarolo dell'Emilia BO 16 11910 564856
Sasso Marconi BO 17 14735 579591
Medicina BO 17 16739 596330
Casalfiumanese BO 18 3438 599768
Borgo Tossignano BO 18 3288 603056
Castel Guelfo di Bologna BO 18 4455 607511
Loiano BO 18 4294 611805
Fontanelice BO 19 1943 613748

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km SE of Bologna (386663 inhabitants)
22 Km W of Imola (69797 inhabitants)
37 Km W of Faenza (58541 inhabitants)
50 Km SE of Modena (184973 inhabitants)
50 Km S of Ferrara (133155 inhabitants)
51 Km W of Forlì (117913 inhabitants)
59 Km W of Ravenna (159116 inhabitants)
62 Km SE of Carpi (70699 inhabitants)
65 Km NE of Prato (191150 inhabitants)
68 Km NE of Pistoia (90315 inhabitants)
70 Km W of Cesena (96758 inhabitants)
73 Km N of Firenze (382808 inhabitants)
73 Km E of Reggio nell'Emilia (171345 inhabitants)
75 Km NE of Scandicci (50609 inhabitants)
79 Km SW of Rovigo (51867 inhabitants)
97 Km W of Rimini (147750 inhabitants)
98 Km NE of Lucca (89046 inhabitants)
99 Km E of Parma (192836 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 2020-08-17
22:56:56		 44.4068 11.4545 23 2020-11-19
12:37:05		 Bollettino Sismico Italiano INGV 84154611
Reviewed
Rev100 		ML 1.7 2020-08-17
22:56:56		 44.3535 11.5562 30 2020-08-17
23:12:45		 Sala Sismica INGV-Roma 82099591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-17 22:56:56 ± 0.19
Latitude 44.4068 ± 0.0099
Longitude 11.4545 ± 0.0252
Depth (km) 23 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 84154611

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1849
Semi-minor axis of confidence ellipse (meter) 893
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 100
Circular confidence region, given by single value of horizontal uncertainty (meter) 1850.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 97
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.46
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.48658
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 84154611
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-07 12:02:41

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 82099591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-17 23:12:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ROSPO.HHZ. 2020-08-17T22:58:37.33 3.0 undecidable manual Sg 14.44 0
IV.SCIAR.HHZ. 2020-08-17T22:58:24.78 3.0 positive manual Pn -6.99 0
IV.PSB1.HHZ. 2020-08-17T22:58:07.02 3.0 positive manual Pg 12.79 0
IV.CMPR.HHZ. 2020-08-17T22:58:04.07 3.0 undecidable manual Pn -3.38 0
CR.STON.BHZ. 2020-08-17T22:58:04.00 3.0 positive manual Pn 0.31 0
IV.MCRV.HHZ. 2020-08-17T22:58:03.67 3.0 undecidable manual Pn 2.35 0
IV.TOLF.HHZ. 2020-08-17T22:58:02.79 3.0 undecidable manual Sg 0.19 0
OX.MPRI.HHZ. 2020-08-17T22:57:57.32 3.0 undecidable manual Sg 2.32 0
IV.SARZ.HHZ. 2020-08-17T22:57:56.04 3.0 undecidable manual Sn -0.01 0
IV.ROSPO.HHZ. 2020-08-17T22:57:54.95 3.0 undecidable manual Pg 10.6 0
IV.CELB.HHZ. 2020-08-17T22:57:28.38 3.0 undecidable manual Pg 0.19 0
MN.TRI.HHZ. 2020-08-17T22:57:26.49 3.0 positive manual Pn -0.82 0
IV.MAGA.HHZ. 2020-08-17T22:57:23.15 0.3 undecidable manual P 337 165.0126 54 0.65 51
ST.VARA.EHZ. 2020-08-17T22:57:22.86 0.3 undecidable manual P 345 163.4142 54 0.57 53
IV.MBAL.EHZ. 2020-08-17T22:57:21.11 0.3 undecidable manual P 342 150.6381 54 0.41 59
IV.ZOVE.EHZ. 2020-08-17T22:57:15.58 0.3 undecidable manual P 1 116.1948 97 -0.27 64
IV.SEI.HHZ. 2020-08-17T22:57:10.36 0.3 undecidable manual S 191 39.8268 113 0.19 76
IV.BRIS.HHZ. 2020-08-17T22:57:09.04 0.3 undecidable manual S 129 31.9458 119 0.77 65
IV.RINC.HHZ. 2020-08-17T22:57:07.04 0.1 undecidable manual P 168 58.9965 104 -0.12 100
IV.FIU.EHN. 2020-08-17T22:57:06.77 0.6 undecidable manual S 6 26.0517 125 -0.16 52
IV.VISG.HHZ. 2020-08-17T22:57:06.57 0.3 undecidable manual S 184 24.2535 127 0.04 81
IV.MTRZ.HHZ. 2020-08-17T22:57:05.11 0.6 undecidable manual S 193 10.6782 152 0.95 41
IV.ZCCA.HHZ. 2020-08-17T22:57:04.34 0.3 undecidable manual P 261 38.4282 114 0.19 77
IV.SEI.HHZ. 2020-08-17T22:57:03.81 0.1 undecidable manual P 191 39.8268 113 -0.55 94
IV.FNVD.HHZ. 2020-08-17T22:57:03.60 0.1 undecidable manual P 225 37.3293 114 -0.41 98
IV.IMOL.HNZ. 2020-08-17T22:57:02.60 0.3 undecidable manual P 103 23.4543 128 0.44 75
IV.BRIS.HHZ. 2020-08-17T22:57:02.62 0.1 undecidable manual P 129 31.9458 119 -0.65 91
IV.MTRZ.HHZ. 2020-08-17T22:57:01.44 0.1 undecidable manual P 193 10.6782 152 0.55 99
IV.FIU.EHN. 2020-08-17T22:57:01.86 0.1 undecidable manual P 6 26.0517 125 -0.63 92
IV.VISG.HHZ. 2020-08-17T22:57:01.70 0.1 undecidable manual P 184 24.2535 127 -0.56 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRZ.HNE. ML:1.5 0.00018645899999999998 1.088 AML other m 2020-08-17T22:57:05.93
IV.MTRZ.HNN. ML:1.8 0.0003634837 0.6528 AML other m 2020-08-17T22:57:06.36
IV.MTRZ.HHN. ML:1.8 0.00035759535 0.6528 AML other m 2020-08-17T22:57:06.36
IV.VISG.HHN. ML:1.4 0.00012129190000000001 0.4992 AML other m 2020-08-17T22:57:06.83
IV.VISG.HHE. ML:1.0 0.00004672851 0.7552 AML other m 2020-08-17T22:57:06.83
IV.MTRZ.HHE. ML:1.4 0.00016459725 0.9728 AML other m 2020-08-17T22:57:06.96
IV.SEI.HHE. ML:1.1 0.000034042290000000004 0.2816 AML other m 2020-08-17T22:57:10.64
IV.SEI.HHN. ML:1.6 0.00011325537000000001 0.1792 AML other m 2020-08-17T22:57:10.75
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