Earthquake with magnitude of ML 1.5 on date 11-09-2021 and time 21:25:56 (UTC) in region 4 km W Ozzano dell'Emilia (BO)

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

  • 11-09-2021 21:25:56 (UTC)
  • 11-09-2021 23:25:56 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.441, 11.432 at 25 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.

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 4 32065 45661
Castenaso BO 8 14925 60586
Pianoro BO 9 17460 78046
Bologna BO 9 386663 464709
Casalecchio di Reno BO 13 36327 501036
Granarolo dell'Emilia BO 13 11910 512946
Monterenzio BO 13 6035 518981
Castel San Pietro Terme BO 13 20811 539792
Budrio BO 14 18412 558204
Sasso Marconi BO 16 14735 572939
Castel Maggiore BO 16 18231 591170
Medicina BO 17 16739 607909
Zola Predosa BO 18 18770 626679
Dozza BO 18 6652 633331
Monte San Pietro BO 18 10982 644313
Calderara di Reno BO 19 13196 657509
Castel Guelfo di Bologna BO 20 4455 661964

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km SE of Bologna (386663 inhabitants)
25 Km W of Imola (69797 inhabitants)
40 Km W of Faenza (58541 inhabitants)
46 Km E of Modena (184973 inhabitants)
46 Km SW of Ferrara (133155 inhabitants)
54 Km W of Forlì (117913 inhabitants)
58 Km SE of Carpi (70699 inhabitants)
61 Km W of Ravenna (159116 inhabitants)
68 Km NE of Prato (191150 inhabitants)
70 Km E of Reggio nell'Emilia (171345 inhabitants)
70 Km NE of Pistoia (90315 inhabitants)
73 Km W of Cesena (96758 inhabitants)
76 Km SW of Rovigo (51867 inhabitants)
76 Km N of Firenze (382808 inhabitants)
78 Km N of Scandicci (50609 inhabitants)
96 Km E of Parma (192836 inhabitants)
99 Km NE of Lucca (89046 inhabitants)
100 Km W of Rimini (147750 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.5 2021-09-11
21:25:56
44.4412 11.4317 25 2021-09-11
21:40:09
Sala Sismica INGV-Roma 95318121
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-11 21:25:56 ± 0.5
Latitude 44.4412 ± 0.0126
Longitude 11.4317 ± 0.0252
Depth (km) 25 ± 5 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95318121

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1708
Semi-minor axis of confidence ellipse (meter) 1248
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 239
Circular confidence region, given by single value of horizontal uncertainty (meter) 1710
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 150
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.43
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.61334
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 95318121
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-11 21:40:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MTMR.EHZ. 2021-09-11T21:27:50.04 3.0 undecidable manual Sn -5.64 0
IV.MMGO.HHZ. 2021-09-11T21:27:36.34 3.0 undecidable manual Pn -2.22 0
IV.LAV9.HHZ. 2021-09-11T21:27:27.92 3.0 undecidable manual Sg 7.04 0
GU.MGRO.HHZ. 2021-09-11T21:27:26.60 3.0 undecidable manual Sg 11.31 0
IV.CERA.HHZ. 2021-09-11T21:27:25.26 3.0 undecidable manual Sn -6.77 0
GU.RORO.HHZ. 2021-09-11T21:27:17.61 3.0 undecidable manual Sg 7.12 0
IV.CMPR.HHZ. 2021-09-11T21:27:15.72 3.0 positive manual Pn 3.58 0
IX.PGN3.HHZ.02 2021-09-11T21:27:14.39 3.0 undecidable manual Pn 2.25 0
IV.MOCO.HHZ. 2021-09-11T21:27:07.43 3.0 undecidable manual Pg 8.03 0
IX.SSB3.HHZ.02 2021-09-11T21:27:01.83 3.0 positive manual Pn -1.21 0
IV.MMO1.EHZ. 2021-09-11T21:26:55.43 3.0 undecidable manual Sn -3.08 0
MN.TRI.HHZ. 2021-09-11T21:26:54.68 3.0 undecidable manual Sn 0.8 0
IV.VIVA.HHZ. 2021-09-11T21:26:52.08 3.0 negative manual Pg 8.89 0
GU.MGRO.HHZ. 2021-09-11T21:26:45.40 3.0 undecidable manual Pg 4.59 0
IV.SFI.EHZ. 2021-09-11T21:26:17.06 1.0 undecidable manual S 151 0.6133 104 -0.91 17
IV.NDIM.HHZ. 2021-09-11T21:26:16.34 0.1 undecidable manual S 320 0.5855 105 -0.82 81
IV.SEI.HHZ. 2021-09-11T21:26:11.25 0.6 undecidable manual S 188 0.3903 113 -0.44 47
IV.BRIS.HHZ. 2021-09-11T21:26:09.49 0.6 undecidable manual S 132 0.3229 118 -0.4 48
IV.NDIM.HHZ. 2021-09-11T21:26:09.12 0.6 undecidable manual P 320 0.5855 105 0.52 62
IV.SFI.EHZ. 2021-09-11T21:26:08.45 1.0 undecidable manual P 151 0.6133 104 -0.61 21
IV.IMOL.EHZ. 2021-09-11T21:26:08.33 0.3 undecidable manual S 110 0.2365 128 0.58 100
IV.VISG.HHZ. 2021-09-11T21:26:07.53 0.6 undecidable manual S 180 0.2518 126 -0.59 45
IV.SEI.HHZ. 2021-09-11T21:26:05.68 0.6 negative manual P 188 0.3903 113 0.24 61
IV.FNVD.HHN. 2021-09-11T21:26:05.60 0.3 undecidable manual P 219 0.3516 116 0.77 93
IV.BRIS.HHZ. 2021-09-11T21:26:04.05 0.3 negative manual P 132 0.3229 118 -0.35 75
IV.IMOL.EHZ. 2021-09-11T21:26:03.16 0.6 undecidable manual P 110 0.2365 128 0 59
IV.VISG.HHZ. 2021-09-11T21:26:03.46 0.3 positive manual P 180 0.2518 126 0.09 91
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHE. ML:1.2 6.665E-5 0.96 AML other m 2021-09-11T21:26:07.23
IV.VISG.HHN. ML:1.2 6.61E-5 0.4 AML other m 2021-09-11T21:26:07.81
IV.BRIS.HHE. ML:1.5 0.0001011 0.28 AML other m 2021-09-11T21:26:08.40
IV.BRIS.HHN. ML:1.4 8.065E-5 0.26 AML other m 2021-09-11T21:26:10.89
IV.SEI.HHE. ML:1.8 0.0001595 0.34 AML other m 2021-09-11T21:26:11.53
IV.SEI.HHN. ML:2 0.0002865 0.3 AML other m 2021-09-11T21:26:11.51
IV.NDIM.HHE. ML:2.5 0.000508 0.08 AML other m 2021-09-11T21:26:20.46
IV.NDIM.HHN. ML:2 0.000172 0.5 AML other m 2021-09-11T21:26:20.55
IV.VIVA.HHN. ML:3.5 0.000366 0.62 AML other m 2021-09-11T21:26:53.50
IV.VIVA.HHE. ML:3.4 0.0002955 0.22 AML other m 2021-09-11T21:26:53.72
IV.MTMR.EHN. ML:4.1 0.0004 0.42 AML other m 2021-09-11T21:27:03.57
IV.MTMR.EHE. ML:3.3 6.25E-5 0.42 AML other m 2021-09-11T21:27:03.58
GU.MGRO.HNN. ML:2.9 0.000116 0.72 AML other m 2021-09-11T21:27:08.92
GU.MGRO.HNE. ML:3.2 0.0002005 0.44 AML other m 2021-09-11T21:27:08.88
IX.SSB3.HHN.02 ML:3.2 4.34E-5 0.42 AML other m 2021-09-11T21:27:39.87
IX.SSB3.HHE.02 ML:3 3.445E-5 1.26 AML other m 2021-09-11T21:27:47.72
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