Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.2 on date 24-11-1990 and time 13:27:32 (UTC) in region 1 km SE Tredozio (FC)

A magnitude Md 2.2 earthquake occured in region: 1 km SE Tredozio (FC), on

  • 24-11-1990 13:27:32 (UTC)
  • 24-11-1990 14:27:32 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.0740, 11.7570 at 11 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
Tredozio FC 1 1212 1212
Portico e San Benedetto FC 6 756 1968
Rocca San Casciano FC 7 1910 3878
Modigliana FC 10 4560 8438
Premilcuore FC 11 799 9237
Marradi FI 11 3139 12376
Dovadola FC 12 1653 14029
Galeata FC 15 2516 16545
Civitella di Romagna FC 16 3786 20331
Brisighella RA 17 7639 27970
Palazzuolo sul Senio FI 17 1154 29124
Predappio FC 18 6346 35470
Santa Sofia FC 19 4136 39606
Castrocaro Terme e Terra del Sole FC 19 6426 46032
San Godenzo FI 20 1167 47199
Casola Valsenio RA 20 2617 49816

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km SW of Faenza (58541 inhabitants)
28 Km SW of Forlì (117913 inhabitants)
31 Km S of Imola (69797 inhabitants)
40 Km W of Cesena (96758 inhabitants)
52 Km SW of Ravenna (159116 inhabitants)
52 Km NE of Firenze (382808 inhabitants)
57 Km E of Prato (191150 inhabitants)
57 Km SE of Bologna (386663 inhabitants)
58 Km NE of Scandicci (50609 inhabitants)
65 Km W of Rimini (147750 inhabitants)
68 Km N of Arezzo (99543 inhabitants)
69 Km E of Pistoia (90315 inhabitants)
86 Km S of Ferrara (133155 inhabitants)
91 Km NE of Siena (53903 inhabitants)
92 Km SE of Modena (184973 inhabitants)
94 Km W of Pesaro (94582 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-VAX 1.7 		1990-11-24
13:27:32		 44.074 11.757 11 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 131169
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-11-24 13:27:32 ± 0.877
Latitude 44.0740 ± 0.0512
Longitude 11.7570 ± 0.0680
Depth (km) 11 ± 8 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 131169

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) 7870.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 213
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) 0.00162
Epicentral distance of station farthest from the epicenter (degree) 0.00923
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

Md:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 131169
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:02:02

ML:1.7

Field Value
Value 1.7
Uncertainty
Num. used stations 1
Type of magnitude ML
Reference to an origin 131169
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.ARV.Z. 1990-11-24T13:28:07.00 10.0 undecidable manual SN 123 1.0212 -0.77 0.2
--.ARV.Z. 1990-11-24T13:27:53.50 10.0 undecidable manual PN 123 1.0212 0.46 0.7
--.PII.Z. 1990-11-24T13:27:53.38 10.0 undecidable manual PG 248 0.9546 1.64 0.1
--.CRE.Z. 1990-11-24T13:27:49.96 10.0 undecidable manual SG 162 0.4662 -0.1 0.5
--.BDI.Z. 1990-11-24T13:27:48.00 10.0 undecidable manual PG 269 0.8214 -1.44 0.1
--.CRE.Z. 1990-11-24T13:27:42.54 10.0 undecidable manual PG 162 0.4662 -0.27 1.3
--.SR3.E. 1990-11-24T13:27:42.00 10.0 undecidable manual SG 163 0.1998 0.72 0.3
--.SFI.Z. 1990-11-24T13:27:40.21 10.0 undecidable manual SG 158 0.1776 -0.46 0.4
--.PGD.Z. 1990-11-24T13:27:40.39 10.0 undecidable manual SG 187 0.1998 -0.86 0.3
--.SR3.Z. 1990-11-24T13:27:38.00 10.0 negative manual PG 163 0.1998 0.26 2.6
--.PGD.Z. 1990-11-24T13:27:37.62 10.0 positive manual PG 187 0.1998 -0.11 2.7
--.SFI.Z. 1990-11-24T13:27:37.34 10.0 positive manual PG 158 0.1776 -0.05 2.7
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