Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.4 on date 03-07-2002 and time 09:03:16 (Italy) in region 1 km NE Velletri (RM)

A magnitude Md 2.4 earthquake occured in region: 1 km NE Velletri (RM), on

  • 03-07-2002 07:03:16 (UTC)
  • 03-07-2002 09:03:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.6910, 12.7860 at 13 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
Velletri RM 1 53303 53303
Lariano RM 6 13432 66735
Nemi RM 7 1943 68678
Lanuvio RM 7 13632 82310
Genzano di Roma RM 8 23970 106280
Ariccia RM 10 19407 125687
Rocca di Papa RM 10 17034 142721
Rocca Massima LT 11 1136 143857
Albano Laziale RM 11 41715 185572
Cisterna di Latina LT 11 36868 222440
Rocca Priora RM 12 11962 234402
Cori LT 12 11065 245467
Artena RM 12 14276 259743
Castel Gandolfo RM 13 8997 268740
Labico RM 14 6379 275119
Marino RM 14 43026 318145
Monte Compatri RM 14 11978 330123
Valmontone RM 15 15959 346082
Grottaferrata RM 15 20327 366409
San Cesareo RM 15 15153 381562
Monte Porzio Catone RM 15 8693 390255
Frascati RM 16 22087 412342
Aprilia LT 16 73446 485788
Colonna RM 16 4287 490075
Zagarolo RM 17 17843 507918
Cave RM 19 11287 519205
Palestrina RM 19 21672 540877
Colleferro RM 19 21595 562472
Norma LT 19 3946 566418
Castel San Pietro Romano RM 20 902 567320
Ciampino RM 20 38412 605732
Segni RM 20 9159 614891

Municipalities with at least 50000 inhabitants

An earthquake occurred to
1 Km NE of Velletri (53303 inhabitants)
16 Km NE of Aprilia (73446 inhabitants)
24 Km E of Pomezia (62966 inhabitants)
27 Km NW of Latina (125985 inhabitants)
30 Km NE of Anzio (54211 inhabitants)
30 Km S of Tivoli (56533 inhabitants)
34 Km SE of Roma (2864731 inhabitants)
35 Km S of Guidonia Montecelio (88673 inhabitants)
46 Km E of Fiumicino (78395 inhabitants)
89 Km SW of L'Aquila (69753 inhabitants)
94 Km E of Civitavecchia (52991 inhabitants)
98 Km S of Terni (111501 inhabitants)
99 Km SE of Viterbo (67173 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 1.8 		2002-07-03
07:03:16		 41.691 12.786 13 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 444519
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2002-07-03 07:03:16 ± 0.187
Latitude 41.6910 ± 0.0110
Longitude 12.7860 ± 0.0111
Depth (km) 13 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 444519

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) 1533.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 164
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
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) 0.00057
Epicentral distance of station farthest from the epicenter (degree) 0.01044
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 6
Type of magnitude Md
Reference to an origin 444519
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 00:00:26

ML:1.8

Field Value
Value 1.8
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 444519
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
--.SDI.Z. 2002-07-03T07:03:43.77 10.0 undecidable manual SG 88 0.7548 0.35 0.2
--.MNS.Z. 2002-07-03T07:03:41.55 10.0 undecidable manual SG 353 0.6882 0.29 0.2
--.VVLD.Z. 2002-07-03T07:03:40.34 10.0 undecidable manual SG 73 0.6327 0.67 0
--.NRCA.Z. 2002-07-03T07:03:38.86 10.0 undecidable manual PN 11 1.1544 0.18 0.7
--.PTQR.Z. 2002-07-03T07:03:36.80 10.0 undecidable manual SG 53 0.555 -0.17 0.5
--.RVI2.Z. 2002-07-03T07:03:35.18 10.0 undecidable manual PG 93 0.9213 -0.01 1.2
--.MNS.Z. 2002-07-03T07:03:31.30 10.0 undecidable manual PG 353 0.6882 0.05 1.4
--.SDI.Z. 2002-07-03T07:03:31.94 10.0 undecidable manual PG 88 0.7548 -0.29 0.6
--.VVLD.Z. 2002-07-03T07:03:29.95 10.0 positive manual PG 73 0.6327 -0.11 2.6
--.PTQR.Z. 2002-07-03T07:03:28.42 10.0 positive manual PG 53 0.555 -0.08 2.9
--.MA9.Z. 2002-07-03T07:03:23.23 10.0 undecidable manual SG 309 0.1221 0.03 0.6
--.LAV9.Z. 2002-07-03T07:03:22.00 10.0 undecidable manual SG 258 0.0666 0.09 0.6
--.MA9.Z. 2002-07-03T07:03:20.14 10.0 undecidable manual PG 309 0.1221 -0.42 0.3
--.LAV9.Z. 2002-07-03T07:03:19.99 10.0 positive manual PG 258 0.0666 0.18 2.3
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