Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 30-08-2021 and time 08:49:43 (Italy) in region 7 km NW Borgo Tossignano (BO)

A magnitude ML 1.3 earthquake occured in region: 7 km NW Borgo Tossignano (BO), on

  • 30-08-2021 06:49:43 (UTC)
  • 30-08-2021 08:49:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.3170, 11.5240 at 30 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Borgo Tossignano BO 7 3288 3288
Fontanelice BO 7 1943 5231
Casalfiumanese BO 8 3438 8669
Monterenzio BO 9 6035 14704
Dozza BO 10 6652 21356
Castel San Pietro Terme BO 11 20811 42167
Castel del Rio BO 12 1246 43413
Casola Valsenio RA 13 2617 46030
Ozzano dell'Emilia BO 15 13596 59626
Imola BO 16 69797 129423
Pianoro BO 16 17460 146883
Riolo Terme RA 17 5720 152603
Loiano BO 17 4294 156897
Castel Guelfo di Bologna BO 18 4455 161352
San Lazzaro di Savena BO 19 32065 193417
Monghidoro BO 20 3749 197166

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km W of Imola (69797 inhabitants)
25 Km SE of Bologna (386663 inhabitants)
29 Km W of Faenza (58541 inhabitants)
43 Km W of Forlì (117913 inhabitants)
55 Km W of Ravenna (159116 inhabitants)
58 Km S of Ferrara (133155 inhabitants)
59 Km NE of Prato (191150 inhabitants)
60 Km SE of Modena (184973 inhabitants)
61 Km W of Cesena (96758 inhabitants)
64 Km NE of Pistoia (90315 inhabitants)
64 Km NE of Firenze (382808 inhabitants)
68 Km NE of Scandicci (50609 inhabitants)
72 Km SE of Carpi (70699 inhabitants)
83 Km SE of Reggio nell'Emilia (171345 inhabitants)
87 Km S of Rovigo (51867 inhabitants)
88 Km W of Rimini (147750 inhabitants)
97 Km NE of Lucca (89046 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
Reviewed
Rev100 		ML 1.3 2021-08-30
06:49:43		 44.3168 11.5235 30 2021-08-30
07:08:49		 Sala Sismica INGV-Roma 94811601
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-30 06:49:43 ± 0.61
Latitude 44.3168 ± 0.0270
Longitude 11.5235 ± 0.0289
Depth (km) 30 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 94811601

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2772
Semi-minor axis of confidence ellipse (meter) 2205
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 341
Circular confidence region, given by single value of horizontal uncertainty (meter) 2770.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 253
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.42
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.55398
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 94811601
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-30 07:08:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TOLF.HHZ. 2021-08-30T06:51:03.05 3.0 undecidable manual Sg 9.24 0
GU.CANO.HHZ. 2021-08-30T06:50:47.16 3.0 undecidable manual Sg 1.75 0
IV.PP3.EHZ. 2021-08-30T06:50:12.91 3.0 positive manual Pn 8.8 0
IV.BAG8.EHZ. 2021-08-30T06:50:02.65 3.0 undecidable manual S -3.09 0
IV.SEI.HHZ. 2021-08-30T06:49:56.54 0.3 undecidable manual S 204 31.9458 128 0.26 72
IV.FNVD.HHE. 2021-08-30T06:49:56.98 0.3 undecidable manual S 243 35.8419 125 -0.14 72
IV.ASQU.HHE. 2021-08-30T06:49:55.21 0.3 undecidable manual P 160 61.494 110 0.35 66
IV.MTRZ.HHZ. 2021-08-30T06:49:53.21 0.1 undecidable manual S 267 7.881 164 0.66 91
IV.VISG.HHZ. 2021-08-30T06:49:52.88 0.1 undecidable manual S 207 15.873 149 -0.53 91
IV.FNVD.HHE. 2021-08-30T06:49:51.50 0.3 undecidable manual P 243 35.8419 125 0.16 73
IV.SEI.HHZ. 2021-08-30T06:49:50.81 0.1 undecidable manual P 204 31.9458 128 -0.05 100
IV.VISG.HHZ. 2021-08-30T06:49:48.86 0.1 undecidable manual P 207 15.873 149 -0.34 96
IV.MTRZ.HHZ. 2021-08-30T06:49:48.51 0.3 undecidable manual P 267 7.881 164 -0.19 75
IV.ZEN8.EHZ. 2021-08-30T06:49:48.60 3.0 negative manual P 1.97 0
GU.GSCL.HHZ. 2021-08-30T06:49:46.52 3.0 positive manual P -4.91 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHN. ML:1.0 0.00004865 0.14 AML other m 2021-08-30T06:49:53.22
IV.VISG.HHE. ML:0.8 0.000032500000000000004 0.22 AML other m 2021-08-30T06:49:53.13
IV.MTRZ.HHE. ML:1.5 0.0001725 0.44 AML other m 2021-08-30T06:49:53.57
IV.MTRZ.HHN. ML:1.5 0.00016949999999999997 0.7 AML other m 2021-08-30T06:49:53.83
IV.SEI.HHE. ML:1.3 0.000061 0.3 AML other m 2021-08-30T06:49:57.70
IV.SEI.HHN. ML:1.3 0.00007125 0.34 AML other m 2021-08-30T06:49:58.96
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