Earthquake with magnitude of Md 2.1 on date 22-11-1990 and time 02:08:33 (Italy) in region S Tredozio (FC)

A magnitude Md 2.1 earthquake occured in region: S Tredozio (FC), on

  • 22-11-1990 01:08:33 (UTC)
  • 22-11-1990 02:08:33 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.08, 11.74 at 10 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
Tredozio FC 0 1212 1212
Portico e San Benedetto FC 6 756 1968
Rocca San Casciano FC 8 1910 3878
Modigliana FC 10 4560 8438
Marradi FI 11 3139 11577
Premilcuore FC 11 799 12376
Dovadola FC 13 1653 14029
Galeata FC 16 2516 16545
Palazzuolo sul Senio FI 16 1154 17699
Brisighella RA 16 7639 25338
Civitella di Romagna FC 17 3786 29124
Casola Valsenio RA 19 2617 31741
Predappio FC 19 6346 38087
San Godenzo FI 19 1167 39254
Santa Sofia FC 19 4136 43390
Castrocaro Terme e Terra del Sole FC 20 6426 49816

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km SW of Faenza (58541 inhabitants)
29 Km SW of Forlì (117913 inhabitants)
31 Km S of Imola (69797 inhabitants)
40 Km W of Cesena (96758 inhabitants)
52 Km NE of Firenze (382808 inhabitants)
53 Km SW of Ravenna (159116 inhabitants)
56 Km E of Prato (191150 inhabitants)
57 Km SE of Bologna (386663 inhabitants)
57 Km NE of Scandicci (50609 inhabitants)
66 Km W of Rimini (147750 inhabitants)
68 Km E of Pistoia (90315 inhabitants)
69 Km N of Arezzo (99543 inhabitants)
85 Km S of Ferrara (133155 inhabitants)
91 Km NE of Siena (53903 inhabitants)
91 Km SE of Modena (184973 inhabitants)
95 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
Rev 1000 Md 2.1
ML-VAX 1.9
1990-11-22
01:08:33
44.08 11.75 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 130789
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-11-22 01:08:33 ± 0.431
Latitude 44.08 ± 0.02
Longitude 11.75 ± 0.04
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 130789

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) 4163.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 331
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00162
Epicentral distance of station farthest from the epicenter (degree) 0.00429
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

Md:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 130789
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:01:41

ML:1.9

Field Value
Value 1.9
Uncertainty
Num. used stations 1
Type of magnitude ML
Reference to an origin 130789
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 Takeoff_angle Residual Weight
--.CRE.Z. 1990-11-22T01:08:51.28 10.0 undecidable manual SG 161 0.0043 -0.01 0.4
--.SR3.E. 1990-11-22T01:08:43.00 10.0 undecidable manual SG 161 0.0018 0.52 0
--.CRE.Z. 1990-11-22T01:08:43.77 10.0 negative manual PG 161 0.0043 -0.19 1.3
--.PGD.Z. 1990-11-22T01:08:42.00 10.0 undecidable manual SG 184 0.0018 -0.35 0.1
--.SFI.Z. 1990-11-22T01:08:41.72 10.0 undecidable manual SG 156 0.0016 -0.17 0.4
--.PGD.Z. 1990-11-22T01:08:39.00 10.0 undecidable manual PG 184 0.0018 0.2 0.8
--.SR3.Z. 1990-11-22T01:08:39.00 10.0 positive manual PG 161 0.0018 0.13 2.3
--.SFI.Z. 1990-11-22T01:08:38.49 10.0 negative manual PG 156 0.0016 -0.04 2.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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