Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.4 on date 04-03-1999 and time 08:08:04 (Italy) in region 2 km S Borgo Velino (RI)

A magnitude Md 2.4 earthquake occured in region: 2 km S Borgo Velino (RI), on

  • 04-03-1999 07:08:04 (UTC)
  • 04-03-1999 08:08:04 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.3880, 13.0670 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.

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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
Borgo Velino RI 2 972 972
Castel Sant'Angelo RI 3 1308 2280
Antrodoco RI 4 2588 4868
Micigliano RI 7 127 4995
Concerviano RI 10 291 5286
Cittaducale RI 10 6828 12114
Petrella Salto RI 10 1197 13311
Fiamignano RI 14 1413 14724
Borbona RI 15 617 15341
Longone Sabino RI 15 597 15938
Cagnano Amiterno AQ 15 1369 17307
Posta RI 15 694 18001
Scoppito AQ 16 3727 21728
Cantalice RI 16 2755 24483
Belmonte in Sabina RI 16 636 25119
Varco Sabino RI 17 187 25306
Rieti RI 17 47698 73004
Rocca Sinibalda RI 17 815 73819
Marcetelli RI 18 89 73908
Barete AQ 19 737 74645
Pizzoli AQ 20 4326 78971
Poggio Bustone RI 20 2055 81026

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km W of L'Aquila (69753 inhabitants)
39 Km E of Terni (111501 inhabitants)
51 Km NE of Guidonia Montecelio (88673 inhabitants)
52 Km NE of Tivoli (56533 inhabitants)
60 Km SW of Teramo (54892 inhabitants)
70 Km SE of Foligno (57155 inhabitants)
73 Km NE of Roma (2864731 inhabitants)
79 Km E of Viterbo (67173 inhabitants)
82 Km N of Velletri (53303 inhabitants)
90 Km W of Montesilvano (53738 inhabitants)
91 Km W of Chieti (51815 inhabitants)
92 Km NE of Pomezia (62966 inhabitants)
95 Km W of Pescara (121014 inhabitants)
95 Km NE of Aprilia (73446 inhabitants)
97 Km NE of Fiumicino (78395 inhabitants)
97 Km SE 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
ML-VAX 1.6 		1999-03-04
07:08:04		 42.388 13.067 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 360639
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1999-03-04 07:08:04 ± 0.108
Latitude 42.3880 ± 0.0079
Longitude 13.0670 ± 0.0083
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 360639

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) 1106.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 123
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00219
Epicentral distance of station farthest from the epicenter (degree) 0.00777
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:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 360639
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:38:11

ML:1.6

Field Value
Value 1.6
Uncertainty
Num. used stations 1
Type of magnitude ML
Reference to an origin 360639
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
--.SNTG.Z. 1999-03-04T07:08:22.46 10.0 undecidable manual PG 354 0.8658 0.56 0.3
--.NRCA.Z. 1999-03-04T07:08:21.10 10.0 undecidable manual SG 4 0.444 -0.29 0.6
--.PQ9.Z. 1999-03-04T07:08:20.79 10.0 undecidable manual SG 146 0.444 -0.33 0.5
--.ASS.Z. 1999-03-04T07:08:19.54 10.0 undecidable manual PG 336 0.7326 0.08 1.5
--.MNS.Z. 1999-03-04T07:08:15.47 10.0 undecidable manual SG 269 0.2775 0.25 0.6
--.AQU.Z. 1999-03-04T07:08:14.37 10.0 undecidable manual SG 97 0.2442 0.52 0.2
--.NRCA.Z. 1999-03-04T07:08:13.47 10.0 undecidable manual PG 4 0.444 -0.55 0.5
--.PQ9.Z. 1999-03-04T07:08:13.94 10.0 undecidable manual PG 146 0.444 0.02 2
--.MNS.Z. 1999-03-04T07:08:10.41 10.0 undecidable manual PG 269 0.2775 -0.1 1.9
--.AQU.Z. 1999-03-04T07:08:09.66 10.0 undecidable manual PG 97 0.2442 -0.06 2
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