Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 25-03-2011 and time 14:35:20 (Italy) in region 3 km S Ozzano dell'Emilia (BO)

A magnitude ML 1.5 earthquake occured in region: 3 km S Ozzano dell'Emilia (BO), on

  • 25-03-2011 13:35:20 (UTC)
  • 25-03-2011 14:35:20 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.4170, 11.4730 at 30 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 3 13596 13596
San Lazzaro di Savena BO 8 32065 45661
Castel San Pietro Terme BO 10 20811 66472
Castenaso BO 10 14925 81397
Pianoro BO 11 17460 98857
Monterenzio BO 11 6035 104892
Bologna BO 14 386663 491555
Dozza BO 14 6652 498207
Budrio BO 14 18412 516619
Medicina BO 15 16739 533358
Granarolo dell'Emilia BO 15 11910 545268
Castel Guelfo di Bologna BO 17 4455 549723
Casalecchio di Reno BO 17 36327 586050
Casalfiumanese BO 18 3438 589488
Borgo Tossignano BO 18 3288 592776
Sasso Marconi BO 18 14735 607511
Fontanelice BO 19 1943 609454
Castel Maggiore BO 20 18231 627685

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km SE of Bologna (386663 inhabitants)
21 Km W of Imola (69797 inhabitants)
36 Km W of Faenza (58541 inhabitants)
48 Km S of Ferrara (133155 inhabitants)
50 Km W of Forlì (117913 inhabitants)
50 Km SE of Modena (184973 inhabitants)
58 Km W of Ravenna (159116 inhabitants)
62 Km SE of Carpi (70699 inhabitants)
67 Km NE of Prato (191150 inhabitants)
69 Km W of Cesena (96758 inhabitants)
70 Km NE of Pistoia (90315 inhabitants)
74 Km E of Reggio nell'Emilia (171345 inhabitants)
74 Km N of Firenze (382808 inhabitants)
77 Km NE of Scandicci (50609 inhabitants)
77 Km SW of Rovigo (51867 inhabitants)
96 Km W of Rimini (147750 inhabitants)
100 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 		Md 2.2
ML 1.5 		2011-03-25
13:35:20		 44.417 11.473 30 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 1186099
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2011-03-25 13:35:20 ± 0.28
Latitude 44.4170 ± 0.0135
Longitude 11.4730 ± 0.0113
Depth (km) 30 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1186099

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1443
Semi-minor axis of confidence ellipse (meter) 711
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 15
Circular confidence region, given by single value of horizontal uncertainty (meter) 1749.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 287
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.86874
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.0
Num. used stations
Type of magnitude ML
Reference to an origin 1186099
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 23:10:00

Md:2.2

Field Value
Value 2.2
Uncertainty 0.1
Num. used stations
Type of magnitude Md
Reference to an origin 1186099
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 23:10:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CAR1.HHN. 2011-03-25T13:35:56.45 10.0 undecidable manual Pg 0 0 0
IV.ASQU.HHE. 2011-03-25T13:35:43.17 0.6 undecidable manual Sg 160 73.371 0.023 46
IV.SFI.EHZ. 2011-03-25T13:35:40.85 0.6 undecidable manual Sg 152 64.1913 0.017 47
IV.NRCA.HHN. 2011-03-25T13:35:40.27 10.0 undecidable manual Pg 0 0 0
IV.CRE.HHN. 2011-03-25T13:35:37.37 0.6 undecidable manual Pg 156 96.4257 0.401 41
IV.HAGA.HHE. 2011-03-25T13:35:36.31 10.0 undecidable manual Pg 0 0 0
IV.FNVD.HHZ. 2011-03-25T13:35:34.69 0.6 undecidable manual Sg 225 39.2274 -0.115 48
IV.ASQU.HHE. 2011-03-25T13:35:33.67 0.3 undecidable manual Pg 160 73.371 0.153 68
IV.SFI.EHZ. 2011-03-25T13:35:31.98 0.3 undecidable manual Pg 152 64.1913 -0.202 68
IV.MTRZ.HHE. 2011-03-25T13:35:30.10 0.6 undecidable manual Sg 198 12.1767 0.186 50
IV.FNVD.HHZ. 2011-03-25T13:35:28.75 0.3 undecidable manual Pg 225 39.2274 0.048 74
IV.MTRZ.HHE. 2011-03-25T13:35:25.67 0.1 undecidable manual Pg 198 12.1767 -0.207 100
IV.LTRZ.EHE. 2011-03-25T13:35:15.72 10.0 undecidable manual Pg 0 0 0
IV.RM32.EHN. 2011-03-25T13:35:02.78 10.0 undecidable manual Pg 0 0 0
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