Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.3 on date 17-12-1990 and time 02:59:07 (UTC) in region 5 km NW Micigliano (RI)

A magnitude Md 2.3 earthquake occured in region: 5 km NW Micigliano (RI), on

  • 17-12-1990 02:59:07 (UTC)
  • 17-12-1990 03:59:07 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.4750, 13.0010 at 5 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
Micigliano RI 5 127 127
Cantalice RI 8 2755 2882
Borgo Velino RI 9 972 3854
Castel Sant'Angelo RI 9 1308 5162
Antrodoco RI 9 2588 7750
Posta RI 10 694 8444
Poggio Bustone RI 10 2055 10499
Leonessa RI 10 2435 12934
Cittaducale RI 11 6828 19762
Borbona RI 12 617 20379
Rivodutri RI 13 1253 21632
Rieti RI 14 47698 69330
Morro Reatino RI 15 373 69703
Concerviano RI 17 291 69994
Labro RI 17 374 70368
Polino TR 18 233 70601
Colli sul Velino RI 18 533 71134
Cagnano Amiterno AQ 19 1369 72503
Greccio RI 19 1558 74061
Belmonte in Sabina RI 19 636 74697

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km E of Terni (111501 inhabitants)
35 Km W of L'Aquila (69753 inhabitants)
57 Km NE of Guidonia Montecelio (88673 inhabitants)
59 Km SE of Foligno (57155 inhabitants)
59 Km N of Tivoli (56533 inhabitants)
61 Km W of Teramo (54892 inhabitants)
74 Km E of Viterbo (67173 inhabitants)
77 Km NE of Roma (2864731 inhabitants)
86 Km SE of Perugia (166134 inhabitants)
90 Km N of Velletri (53303 inhabitants)
94 Km W of Montesilvano (53738 inhabitants)
97 Km W of Chieti (51815 inhabitants)
98 Km NE of Pomezia (62966 inhabitants)
100 Km W of Pescara (121014 inhabitants)
100 Km NE of Fiumicino (78395 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 2.3
ML-VAX 1.7 		1990-12-17
02:59:07		 42.475 13.001 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 132559
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-12-17 02:59:07 ± 0.146
Latitude 42.4750 ± 0.0077
Longitude 13.0010 ± 0.0145
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 132559

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) 1464.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 137
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
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) 0.00283
Epicentral distance of station farthest from the epicenter (degree) 0.00915
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:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 132559
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:03:30

ML:1.7

Field Value
Value 1.7
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 132559
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. 1990-12-17T02:59:43.00 10.0 undecidable manual SG 357 1.0101 0.25 0.5
--.SDI.Z. 1990-12-17T02:59:40.00 10.0 undecidable manual SG 141 0.9657 -1.09 0
--.ASS.Z. 1990-12-17T02:59:30.16 10.0 undecidable manual SG 336 0.6327 -0.28 0.6
--.CP9.Z. 1990-12-17T02:59:29.65 10.0 undecidable manual SG 183 0.6105 0.06 0.7
--.AZI.Z. 1990-12-17T02:59:29.00 10.0 undecidable manual SG 146 0.5772 0.37 0.5
--.ARV.Z. 1990-12-17T02:59:28.00 10.0 undecidable manual PG 357 1.0101 0.35 1.1
--.SDI.Z. 1990-12-17T02:59:27.20 10.0 undecidable manual PG 141 0.9657 0.51 0.7
--.RMP.Z. 1990-12-17T02:59:21.77 10.0 undecidable manual PG 198 0.6882 0.14 1.8
--.AZI.Z. 1990-12-17T02:59:20.00 10.0 undecidable manual PG 146 0.5772 0.51 0.9
--.ASS.Z. 1990-12-17T02:59:20.10 10.0 undecidable manual PG 336 0.6327 -0.44 1.1
--.CP9.Z. 1990-12-17T02:59:19.56 10.0 undecidable manual PG 183 0.6105 -0.48 0.9
--.AQU.Z. 1990-12-17T02:59:19.20 10.0 undecidable manual SG 112 0.3108 -0.41 0.5
--.AQU.Z. 1990-12-17T02:59:14.10 10.0 positive manual PG 112 0.3108 -0.08 3.7
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