Earthquake with magnitude of Md 2.2 on date 28-07-1986 and time 00:58:24 (UTC) in region 8 km E Civitella di Romagna (FC)

A magnitude Md 2.2 earthquake occured in region: 8 km E Civitella di Romagna (FC), on

  • 28-07-1986 00:58:24 (UTC)
  • 28-07-1986 02:58:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.992, 12.035 at 69 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
Civitella di Romagna FC 8 3786 3786
Galeata FC 10 2516 6302
Santa Sofia FC 11 4136 10438
Sarsina FC 12 3446 13884
Predappio FC 13 6346 20230
Mercato Saraceno FC 14 6886 27116
Meldola FC 15 9970 37086
Bagno di Romagna FC 16 6026 43112
Rocca San Casciano FC 17 1910 45022
Dovadola FC 19 1653 46675
Bertinoro FC 19 11059 57734
Sant'Agata Feltria RN 20 2151 59885

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km SW of Cesena (96758 inhabitants)
26 Km S of Forlì (117913 inhabitants)
35 Km SE of Faenza (58541 inhabitants)
43 Km W of Rimini (147750 inhabitants)
48 Km SE of Imola (69797 inhabitants)
49 Km S of Ravenna (159116 inhabitants)
60 Km N of Arezzo (99543 inhabitants)
67 Km E of Firenze (382808 inhabitants)
71 Km W of Pesaro (94582 inhabitants)
73 Km E of Scandicci (50609 inhabitants)
76 Km E of Prato (191150 inhabitants)
79 Km SE of Bologna (386663 inhabitants)
81 Km W of Fano (60888 inhabitants)
90 Km E of Pistoia (90315 inhabitants)
94 Km NE of Siena (53903 inhabitants)
100 Km SE of Ferrara (133155 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 1986-07-28
00:58:24
43.992 12.035 69 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 31689
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-07-28 00:58:24 ± 0.584
Latitude 43.9920 ± 0.0411
Longitude 12.0350 ± 0.0265
Depth (km) 69 ± 7 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 31689

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) 5042.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 178
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00332
Epicentral distance of station farthest from the epicenter (degree) 0.0238
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 31689
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:32:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.FO1.Z. 1986-07-28T00:59:05.50 10.0 undecidable manual P 11 0.0238 0.55 0.5
--.BDI.Z. 1986-07-28T00:58:57.50 10.0 undecidable manual S 274 0.0093 0.09 0.8
--.CTI.Z. 1986-07-28T00:58:56.50 10.0 undecidable manual P 352 0.0186 -0.6 0.4
--.CRE.Z. 1986-07-28T00:58:45.00 10.0 undecidable manual S 189 0.0033 0.14 0.7
--.BDI.Z. 1986-07-28T00:58:43.50 10.0 undecidable manual P 274 0.0093 0.05 1.9
--.CRE.Z. 1986-07-28T00:58:36.00 10.0 undecidable manual P 189 0.0033 -0.2 1.7
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