Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.4 on date 22-05-1990 and time 14:21:56 (UTC) in region 6 km SE Santa Sofia (FC)

A magnitude Md 2.4 earthquake occured in region: 6 km SE Santa Sofia (FC), on

  • 22-05-1990 14:21:56 (UTC)
  • 22-05-1990 16:21:56 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.9040, 11.9410 at 9 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Santa Sofia FC 6 4136 4136
Bagno di Romagna FC 6 6026 10162
Galeata FC 11 2516 12678
Civitella di Romagna FC 12 3786 16464
Verghereto FC 13 1907 18371
Premilcuore FC 16 799 19170
Sarsina FC 16 3446 22616
Portico e San Benedetto FC 19 756 23372
Rocca San Casciano FC 19 1910 25282

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km SW of Cesena (96758 inhabitants)
36 Km S of Forlì (117913 inhabitants)
43 Km S of Faenza (58541 inhabitants)
49 Km N of Arezzo (99543 inhabitants)
53 Km W of Rimini (147750 inhabitants)
53 Km SE of Imola (69797 inhabitants)
57 Km E of Firenze (382808 inhabitants)
61 Km SW of Ravenna (159116 inhabitants)
63 Km E of Scandicci (50609 inhabitants)
68 Km E of Prato (191150 inhabitants)
78 Km W of Pesaro (94582 inhabitants)
81 Km SE of Bologna (386663 inhabitants)
81 Km NE of Siena (53903 inhabitants)
82 Km E of Pistoia (90315 inhabitants)
87 Km W of Fano (60888 inhabitants)
96 Km NW of Perugia (166134 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 2.4 1990-05-22
14:21:56		 43.904 11.941 9 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 119389
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-05-22 14:21:56 ± 0.22
Latitude 43.9040 ± 0.0205
Longitude 11.9410 ± 0.0157
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 119389

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) 2603.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 166
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
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) 0.00057
Epicentral distance of station farthest from the epicenter (degree) 0.00882
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:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 119389
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:50:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.BDI.Z. 1990-05-22T14:22:30.00 10.0 undecidable manual SG 279 0.9657 -0.27 0.4
--.ASS.Z. 1990-05-22T14:22:30.00 10.0 undecidable manual SG 148 0.9768 -0.49 0.3
--.ARV.Z. 1990-05-22T14:22:26.00 10.0 undecidable manual SG 118 0.8214 0.53 0.3
--.ASS.Z. 1990-05-22T14:22:16.50 10.0 undecidable manual PG 148 0.9768 0.29 0.9
--.BDI.Z. 1990-05-22T14:22:15.00 10.0 undecidable manual PG 279 0.9657 -1.09 0.1
--.FIR.Z. 1990-05-22T14:22:15.00 10.0 undecidable manual SG 255 0.4995 -0.24 0.5
--.ARV.Z. 1990-05-22T14:22:13.00 10.0 undecidable manual PG 118 0.8214 -0.31 1
--.FIR.Z. 1990-05-22T14:22:09.00 10.0 undecidable manual PG 255 0.4995 1.59 0
--.CRE.Z. 1990-05-22T14:22:07.50 10.0 undecidable manual SG 178 0.2775 -0.44 0.4
--.RSM.Z. 1990-05-22T14:22:05.40 10.0 undecidable manual PG 85 0.3552 0.28 1.3
--.PGD.Z. 1990-05-22T14:22:04.14 10.0 undecidable manual SG 259 0.1554 0.52 0.4
--.CRE.Z. 1990-05-22T14:22:03.00 10.0 undecidable manual PG 178 0.2775 -0.19 1.4
--.SFI.Z. 1990-05-22T14:22:01.24 10.0 undecidable manual SG 270 0.0666 0.51 0.4
--.SR3.Z. 1990-05-22T14:22:01.00 10.0 undecidable manual SG 253 0.0666 -0.05 0.6
--.PGD.Z. 1990-05-22T14:22:00.71 10.0 positive manual PG 259 0.1554 0.01 3.1
--.SR3.Z. 1990-05-22T14:21:59.00 10.0 positive manual PG 253 0.0666 -0.22 2.8
--.SFI.Z. 1990-05-22T14:21:58.93 10.0 positive manual PG 270 0.0666 -0.1 3
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