Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.5 on date 12-07-1993 and time 08:20:38 (UTC) in region 3 km W Colli sul Velino (RI)

A magnitude Md 2.5 earthquake occured in region: 3 km W Colli sul Velino (RI), on

  • 12-07-1993 08:20:38 (UTC)
  • 12-07-1993 10:20:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.4900, 12.7490 at 14 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
Colli sul Velino RI 3 533 533
Greccio RI 4 1558 2091
Labro RI 6 374 2465
Stroncone TR 7 4917 7382
Morro Reatino RI 8 373 7755
Contigliano RI 9 3783 11538
Rivodutri RI 9 1253 12791
Cottanello RI 11 563 13354
Arrone TR 11 2763 16117
Configni RI 11 633 16750
Poggio Bustone RI 11 2055 18805
Terni TR 12 111501 130306
Montefranco TR 12 1276 131582
Montasola RI 13 395 131977
Cantalice RI 13 2755 134732
Polino TR 13 233 134965
Rieti RI 13 47698 182663
Vacone RI 15 256 182919
Ferentillo TR 15 1913 184832
Torri in Sabina RI 18 1256 186088
Calvi dell'Umbria TR 18 1856 187944
Casperia RI 18 1246 189190
Monte San Giovanni in Sabina RI 18 714 189904
Montebuono RI 18 883 190787
Roccantica RI 19 563 191350
Leonessa RI 19 2435 193785
Narni TR 19 19785 213570
Tarano RI 19 1444 215014
Cittaducale RI 20 6828 221842

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km SE of Terni (111501 inhabitants)
52 Km S of Foligno (57155 inhabitants)
53 Km E of Viterbo (67173 inhabitants)
54 Km N of Guidonia Montecelio (88673 inhabitants)
56 Km W of L'Aquila (69753 inhabitants)
59 Km N of Tivoli (56533 inhabitants)
70 Km NE of Roma (2864731 inhabitants)
75 Km SE of Perugia (166134 inhabitants)
81 Km W of Teramo (54892 inhabitants)
89 Km N of Velletri (53303 inhabitants)
90 Km NE of Civitavecchia (52991 inhabitants)
90 Km NE of Fiumicino (78395 inhabitants)
93 Km N of Pomezia (62966 inhabitants)
100 Km N of Aprilia (73446 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 2.5
ML-VAX 2.1 		1993-07-12
08:20:38		 42.49 12.749 14 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 190639
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1993-07-12 08:20:38 ± 0.235
Latitude 42.4900 ± 0.0191
Longitude 12.7490 ± 0.0391
Depth (km) 14 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 190639

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) 3846.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 147
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) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00097
Epicentral distance of station farthest from the epicenter (degree) 0.00915
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitudes information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 190639
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:59:02

ML:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 190639
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. 1993-07-12T08:21:12.60 10.0 undecidable manual SN 7 1.0101 -0.42 0.4
--.RDP.Z. 1993-07-12T08:21:03.00 10.0 undecidable manual SG 181 0.7326 -1.08 0.2
--.RMP.Z. 1993-07-12T08:21:02.79 10.0 undecidable manual SG 182 0.6771 0.36 0.6
--.ARV.Z. 1993-07-12T08:20:58.36 10.0 positive manual PN 7 1.0101 0.18 2.6
--.ASS.Z. 1993-07-12T08:20:57.83 10.0 undecidable manual SG 352 0.5772 -1.31 0.1
--.AQU.Z. 1993-07-12T08:20:55.80 10.0 undecidable manual SG 105 0.4995 -0.89 0.3
--.RMP.Z. 1993-07-12T08:20:53.47 10.0 undecidable manual PG 182 0.6771 1.09 0.5
--.RDP.Z. 1993-07-12T08:20:52.00 10.0 undecidable manual PG 181 0.7326 -1.33 0.3
--.ASS.Z. 1993-07-12T08:20:50.75 10.0 undecidable manual PG 352 0.5772 0.27 1.7
--.AQU.Z. 1993-07-12T08:20:49.68 10.0 undecidable manual PG 105 0.4995 0.62 1.2
--.MNS.Z. 1993-07-12T08:20:44.66 10.0 undecidable manual SG 205 0.111 -0.35 0.6
--.MNS.Z. 1993-07-12T08:20:42.55 10.0 negative manual PG 205 0.111 0.23 3.4
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