Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.3 on date 22-12-2004 and time 12:20:48 (Italy) in region SW Roviano (RM)

A magnitude Md 2.3 earthquake occured in region: SW Roviano (RM), on

  • 22-12-2004 11:20:48 (UTC)
  • 22-12-2004 12:20:48 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.0250, 12.9920 at 21 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
Roviano RM 0 1351 1351
Anticoli Corrado RM 2 915 2266
Arsoli RM 3 1586 3852
Cineto Romano RM 4 601 4453
Marano Equo RM 4 779 5232
Saracinesco RM 4 185 5417
Riofreddo RM 4 781 6198
Oricola AQ 5 1244 7442
Mandela RM 6 917 8359
Agosta RM 6 1765 10124
Sambuci RM 6 925 11049
Rocca di Botte AQ 6 856 11905
Vallinfreda RM 7 283 12188
Cervara di Roma RM 8 455 12643
Ciciliano RM 8 1336 13979
Rocca Canterano RM 8 196 14175
Roccagiovine RM 8 263 14438
Vicovaro RM 8 4019 18457
Vivaro Romano RM 9 182 18639
Cerreto Laziale RM 9 1118 19757
Licenza RM 9 1011 20768
Camerata Nuova RM 10 447 21215
Canterano RM 10 351 21566
Pereto AQ 10 682 22248
Gerano RM 10 1263 23511
Percile RM 10 255 23766
Carsoli AQ 11 5396 29162
Castel Madama RM 12 7399 36561
San Polo dei Cavalieri RM 13 2992 39553
Orvinio RI 13 405 39958
Turania RI 13 241 40199
Rocca Santo Stefano RM 13 975 41174
Pisoniano RM 13 770 41944
Collalto Sabino RI 13 442 42386
Subiaco RM 14 9074 51460
Marcellina RM 15 7280 58740
San Gregorio da Sassola RM 15 1619 60359
Pozzaglia Sabina RI 15 360 60719
San Vito Romano RM 16 3273 63992
Casape RM 16 744 64736
Nespolo RI 16 246 64982
Bellegra RM 16 2887 67869
Monteflavio RM 16 1348 69217
Poli RM 17 2418 71635
Collegiove RI 17 213 71848
Tivoli RM 17 56533 128381
Roiate RM 18 737 129118
Affile RM 18 1548 130666
Capranica Prenestina RM 18 351 131017
Paganico Sabino RI 18 172 131189
Olevano Romano RM 19 6687 137876
Arcinazzo Romano RM 19 1348 139224
Ascrea RI 19 234 139458
Palombara Sabina RM 19 13269 152727
Sante Marie AQ 20 1166 153893
Montorio Romano RM 20 1984 155877
Scandriglia RI 20 3108 158985

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km E of Tivoli (56533 inhabitants)
22 Km E of Guidonia Montecelio (88673 inhabitants)
42 Km NE of Velletri (53303 inhabitants)
44 Km E of Roma (2864731 inhabitants)
50 Km SW of L'Aquila (69753 inhabitants)
56 Km NE of Aprilia (73446 inhabitants)
57 Km NE of Pomezia (62966 inhabitants)
62 Km N of Latina (125985 inhabitants)
66 Km SE of Terni (111501 inhabitants)
68 Km E of Fiumicino (78395 inhabitants)
71 Km NE of Anzio (54211 inhabitants)
85 Km SE of Viterbo (67173 inhabitants)
92 Km SW of Teramo (54892 inhabitants)
99 Km E of Civitavecchia (52991 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 2004-12-22
11:20:48		 42.025 12.992 21 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 509939
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2004-12-22 11:20:48 ± 0.548
Latitude 42.0250 ± 0.0195
Longitude 12.9920 ± 0.0178
Depth (km) 21 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 509939

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) 2619.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 95
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00065
Epicentral distance of station farthest from the epicenter (degree) 0.00380
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 509939
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 01:08:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.FIAM.Z. 2004-12-22T11:21:00.10 10.0 undecidable manual SG 20 0.2553 0.46 0.6
--.PTQR.Z. 2004-12-22T11:21:00.94 10.0 undecidable manual SG 90 0.2997 0.18 0.8
--.MTCE.Z. 2004-12-22T11:20:58.50 10.0 undecidable manual SG 269 0.1776 0.87 0.2
--.MNS.Z. 2004-12-22T11:20:57.00 10.0 undecidable manual PG 327 0.4218 -0.61 0.8
--.PTQR.Z. 2004-12-22T11:20:55.85 10.0 undecidable manual PG 90 0.2997 0.36 1.5
--.CERT.Z. 2004-12-22T11:20:54.96 10.0 undecidable manual SG 185 0.0666 -0.58 0.5
--.MTCE.Z. 2004-12-22T11:20:54.11 10.0 undecidable manual PG 269 0.1776 0.43 1.6
--.FIAM.Z. 2004-12-22T11:20:54.54 10.0 undecidable manual PG 20 0.2553 -0.25 1.9
--.CERT.Z. 2004-12-22T11:20:51.89 10.0 undecidable manual PG 185 0.0666 -0.58 1.2
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