Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 28-08-2020 and time 21:34:35 (UTC) in region 4 km S Monzuno (BO)

A magnitude ML 1.5 earthquake occured in region: 4 km S Monzuno (BO), on

  • 28-08-2020 21:34:35 (UTC)
  • 28-08-2020 23:34:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2430, 11.2720 at 17 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
Monzuno BO 4 6328 6328
San Benedetto Val di Sambro BO 4 4315 10643
Monghidoro BO 4 3749 14392
Loiano BO 5 4294 18686
Grizzana Morandi BO 10 3916 22602
Marzabotto BO 12 6779 29381
Vergato BO 13 7639 37020
Monterenzio BO 14 6035 43055
Castiglione dei Pepoli BO 15 5648 48703
Firenzuola FI 16 4726 53429
Camugnano BO 17 1885 55314
Pianoro BO 17 17460 72774
Sasso Marconi BO 17 14735 87509
Castel del Rio BO 19 1246 88755

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km S of Bologna (386663 inhabitants)
37 Km W of Imola (69797 inhabitants)
43 Km NE of Prato (191150 inhabitants)
45 Km NE of Pistoia (90315 inhabitants)
49 Km W of Faenza (58541 inhabitants)
53 Km N of Firenze (382808 inhabitants)
53 Km SE of Modena (184973 inhabitants)
54 Km N of Scandicci (50609 inhabitants)
61 Km W of Forlì (117913 inhabitants)
67 Km SE of Carpi (70699 inhabitants)
72 Km SW of Ferrara (133155 inhabitants)
72 Km SE of Reggio nell'Emilia (171345 inhabitants)
76 Km NE of Lucca (89046 inhabitants)
76 Km W of Ravenna (159116 inhabitants)
78 Km W of Cesena (96758 inhabitants)
91 Km NE of Pisa (89158 inhabitants)
92 Km E of Viareggio (62467 inhabitants)
93 Km E of Massa (69479 inhabitants)
96 Km E of Carrara (63133 inhabitants)
97 Km SE of Parma (192836 inhabitants)
99 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 1.5 2020-08-28
21:34:35		 44.243 11.2722 17 2020-11-19
12:37:04		 Bollettino Sismico Italiano INGV 83846301
Reviewed
Rev100 		ML 1.5 2020-08-28
21:34:35		 44.2387 11.2723 16 2020-08-28
21:42:31		 Sala Sismica INGV-Roma 82418341
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-28 21:34:35 ± 0.18
Latitude 44.2430 ± 0.0063
Longitude 11.2722 ± 0.0100
Depth (km) 17 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 83846301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 758
Semi-minor axis of confidence ellipse (meter) 387
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 322
Circular confidence region, given by single value of horizontal uncertainty (meter) 760.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.12770
Epicentral distance of station farthest from the epicenter (degree) 0.52430
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 82418341
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-28 21:42:31

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 83846301
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-10-17 10:40:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.POPM.HHZ. 2020-08-28T21:34:51.07 0.3 undecidable manual S 242 46.5201 100 0.33 69
IV.RONT.HHZ. 2020-08-28T21:34:46.93 0.3 undecidable manual S 155 30.4473 108 0.34 72
IV.RAVA.EHN. 2020-08-28T21:34:45.97 0.1 undecidable manual P 348 58.1973 98 -0.2 94
IV.SEI.HHZ. 2020-08-28T21:34:44.57 0.3 undecidable manual S 162 22.0668 118 0.07 77
GU.POPM.HHZ. 2020-08-28T21:34:44.07 0.3 undecidable manual P 242 46.5201 100 -0.32 71
IV.BRIS.HHZ. 2020-08-28T21:34:43.53 0.1 undecidable manual P 93 39.3273 103 0.22 98
IV.VISG.HHZ. 2020-08-28T21:34:42.57 0.3 undecidable manual S 115 14.1747 133 -0.22 75
IV.ZCCA.HHZ. 2020-08-28T21:34:42.02 0.6 undecidable manual P 297 26.3514 112 0.63 44
IV.FNVD.HHZ. 2020-08-28T21:34:42.88 0.3 undecidable manual S 235 14.4744 132 0.03 78
IV.RONT.HHZ. 2020-08-28T21:34:41.84 0.1 undecidable manual P 155 30.4473 108 -0.15 100
IV.SEI.HHZ. 2020-08-28T21:34:40.53 0.1 undecidable manual P 162 22.0668 118 -0.26 99
IV.MTRZ.HHZ. 2020-08-28T21:34:40.24 0.1 undecidable manual P 57 14.3745 132 0.42 98
IV.VISG.HHZ. 2020-08-28T21:34:39.46 0.1 undecidable manual P 115 14.1747 133 -0.34 98
IV.FNVD.HHZ. 2020-08-28T21:34:39.70 0.3 undecidable manual P 235 14.4744 132 -0.13 78
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHN. ML:1.6 0.0003025 0.1 AML other m 2020-08-28T21:34:43.18
IV.SEI.HHN. ML:1.7 0.00030199999999999997 0.96 AML other m 2020-08-28T21:34:44.89
IV.SEI.HHE. ML:1.5 0.00019250000000000002 1.6 AML other m 2020-08-28T21:34:45.02
IV.MTRZ.HHN. ML:1.6 0.0003165 0.42 AML other m 2020-08-28T21:34:48.61
IV.RONT.HHE. ML:1.5 0.00013550000000000001 0.5 AML other m 2020-08-28T21:34:48.60
IV.RONT.HHN. ML:1.4 0.0001022 0.24 AML other m 2020-08-28T21:34:50.16
IV.BRIS.HHE. ML:1.3 0.00006541824 0.1152 AML other m 2020-08-28T21:34:50.55
IV.BRIS.HHN. ML:1.6 0.0001191459 0.32 AML other m 2020-08-28T21:34:50.65
IV.MTRZ.HHE. ML:1.6 0.0003125 0.52 AML other m 2020-08-28T21:34:51.85
GU.POPM.HHN. ML:1.2 0.0000471 0.16 AML other m 2020-08-28T21:34:54.16
GU.POPM.HHE. ML:1.1 0.00003365 0.22 AML other m 2020-08-28T21:34:54.23
IV.VISG.HHE. ML:1.4 0.0001698402 0.1408 AML other m 2020-08-28T21:34:42.84
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