Earthquake with magnitude of Md 2.9 on date 04-07-1986 and time 08:50:53 (UTC) in region 5 km SW Castel San Pietro Terme (BO)

A magnitude Md 2.9 earthquake occured in region: 5 km SW Castel San Pietro Terme (BO), on

  • 04-07-1986 08:50:53 (UTC)
  • 04-07-1986 10:50:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.366, 11.547 at 5 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Castel San Pietro Terme BO 5 20811 20811
Dozza BO 7 6652 27463
Casalfiumanese BO 9 3438 30901
Borgo Tossignano BO 10 3288 34189
Ozzano dell'Emilia BO 10 13596 47785
Fontanelice BO 12 1943 49728
Monterenzio BO 12 6035 55763
Castel Guelfo di Bologna BO 13 4455 60218
Imola BO 13 69797 130015
Medicina BO 15 16739 146754
San Lazzaro di Savena BO 16 32065 178819
Pianoro BO 16 17460 196279
Casola Valsenio RA 17 2617 198896
Castenaso BO 17 14925 213821
Castel del Rio BO 17 1246 215067
Riolo Terme RA 17 5720 220787
Budrio BO 19 18412 239199

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km W of Imola (69797 inhabitants)
22 Km SE of Bologna (386663 inhabitants)
28 Km W of Faenza (58541 inhabitants)
42 Km W of Forlì (117913 inhabitants)
52 Km W of Ravenna (159116 inhabitants)
53 Km S of Ferrara (133155 inhabitants)
58 Km SE of Modena (184973 inhabitants)
61 Km W of Cesena (96758 inhabitants)
65 Km NE of Prato (191150 inhabitants)
69 Km NE of Pistoia (90315 inhabitants)
70 Km SE of Carpi (70699 inhabitants)
70 Km NE of Firenze (382808 inhabitants)
74 Km NE of Scandicci (50609 inhabitants)
81 Km S of Rovigo (51867 inhabitants)
82 Km E of Reggio nell'Emilia (171345 inhabitants)
88 Km W of Rimini (147750 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 2.9 1986-07-04
08:50:53
44.366 11.547 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 30579
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-07-04 08:50:53 ± 0.146
Latitude 44.3660 ± 0.0122
Longitude 11.5470 ± 0.0174
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 30579

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 1939
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 87
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00664
Epicentral distance of station farthest from the epicenter (degree) 0.02258
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

Md:2.9

Field Value
Value 2.9
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 30579
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:31:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CTI.Z. 1986-07-04T08:51:44.50 10.0 undecidable manual SN 1 0.0151 -0.48 0.4
--.ARV.Z. 1986-07-04T08:51:37.00 10.0 undecidable manual SN 129 0.0119 0.45 0.6
--.RBL.Z. 1986-07-04T08:51:35.00 10.0 undecidable manual PN 32 0.0226 0.54 0.9
--.FO1.Z. 1986-07-04T08:51:32.50 10.0 undecidable manual PN 20 0.0215 -0.26 1.2
--.TRI.Z. 1986-07-04T08:51:28.00 10.0 undecidable manual PN 47 0.0185 -0.28 1.3
--.CTI.Z. 1986-07-04T08:51:23.00 10.0 undecidable manual PN 1 0.0151 -0.07 1.8
--.CO9.Z. 1986-07-04T08:51:22.00 10.0 undecidable manual PN 285 0.0139 0.78 0.7
--.ASS.Z. 1986-07-04T08:51:21.90 10.0 undecidable manual PN 147 0.0137 0.94 0.4
--.BDI.Z. 1986-07-04T08:51:19.50 10.0 undecidable manual SG 245 0.0066 -0.44 0.5
--.ARV.Z. 1986-07-04T08:51:18.00 10.0 undecidable manual PN 129 0.0119 -0.2 1.7
--.CRE.Z. 1986-07-04T08:51:09.00 10.0 undecidable manual PG 157 0.0072 -0.63 0.8
--.BDI.Z. 1986-07-04T08:51:08.50 10.0 undecidable manual PG 245 0.0066 -0.11 1.8
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download