Earthquake with magnitude of Md 3.1 on date 03-08-2000 and time 04:34:20 (UTC) in region 2 km NW Velletri (RM)

A magnitude Md 3.1 earthquake occured in region: 2 km NW Velletri (RM), on

  • 03-08-2000 04:34:20 (UTC)
  • 03-08-2000 06:34:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.7000, 12.7600 at 7 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.

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 2 53303 53303
Nemi RM 4 1943 55246
Lanuvio RM 5 13632 68878
Genzano di Roma RM 6 23970 92848
Lariano RM 7 13432 106280
Ariccia RM 8 19407 125687
Rocca di Papa RM 8 17034 142721
Albano Laziale RM 9 41715 184436
Castel Gandolfo RM 11 8997 193433
Rocca Priora RM 11 11962 205395
Marino RM 12 43026 248421
Monte Compatri RM 12 11978 260399
Grottaferrata RM 13 20327 280726
Cisterna di Latina LT 13 36868 317594
Monte Porzio Catone RM 13 8693 326287
Rocca Massima LT 14 1136 327423
Frascati RM 14 22087 349510
Artena RM 14 14276 363786
San Cesareo RM 14 15153 378939
Labico RM 14 6379 385318
Cori LT 14 11065 396383
Aprilia LT 15 73446 469829
Colonna RM 15 4287 474116
Valmontone RM 16 15959 490075
Zagarolo RM 17 17843 507918
Ciampino RM 17 38412 546330
Palestrina RM 19 21672 568002
Cave RM 20 11287 579289
Gallicano nel Lazio RM 20 6334 585623
Castel San Pietro Romano RM 20 902 586525

Municipalities with at least 50000 inhabitants

An earthquake occurred to
2 Km NW of Velletri (53303 inhabitants)
15 Km NE of Aprilia (73446 inhabitants)
22 Km E of Pomezia (62966 inhabitants)
28 Km NW of Latina (125985 inhabitants)
30 Km S of Tivoli (56533 inhabitants)
30 Km NE of Anzio (54211 inhabitants)
31 Km SE of Roma (2864731 inhabitants)
34 Km S of Guidonia Montecelio (88673 inhabitants)
44 Km E of Fiumicino (78395 inhabitants)
90 Km SW of L'Aquila (69753 inhabitants)
91 Km E of Civitavecchia (52991 inhabitants)
96 Km S of Terni (111501 inhabitants)
96 Km SE of Viterbo (67173 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
Md 3.1
ML-VAX 2.4
2000-08-03
04:34:20
41.7 12.76 7 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 399989
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2000-08-03 04:34:20 ± 0.228
Latitude 41.7000 ± 0.0176
Longitude 12.7600 ± 0.0250
Depth (km) 7 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 399989

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) 2847.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 131
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
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) 0.00040
Epicentral distance of station farthest from the epicenter (degree) 0.01789
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 399989
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 23:16:12

ML:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 399989
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. 2000-08-03T04:35:09.86 10.0 undecidable manual SN 4 1.554 1.02 0.2
--.ASS.Z. 2000-08-03T04:35:04.50 10.0 undecidable manual SN 356 1.3542 -0.14 0.6
--.NRCA.Z. 2000-08-03T04:35:00.46 10.0 undecidable manual SN 12 1.1544 1.06 0.2
--.CRVI.Z. 2000-08-03T04:34:59.68 10.0 undecidable manual SN 88 1.1544 0.49 0.5
--.RFI.Z. 2000-08-03T04:34:55.91 10.0 undecidable manual SG 113 0.999 0.88 0.4
--.FB9.Z. 2000-08-03T04:34:54.83 10.0 undecidable manual PN 0 1.9869 0.53 0.9
--.ARV.Z. 2000-08-03T04:34:51.59 10.0 undecidable manual PN 4 1.7982 -0.13 1.3
--.AQU.Z. 2000-08-03T04:34:50.47 10.0 undecidable manual SG 35 0.7992 1.56 0.1
--.SNTG.Z. 2000-08-03T04:34:48.31 10.0 undecidable manual PN 4 1.554 -0.07 1.4
--.SDI.Z. 2000-08-03T04:34:48.71 10.0 undecidable manual SG 88 0.777 0.61 0.6
--.ASS.Z. 2000-08-03T04:34:45.46 10.0 undecidable manual PN 356 1.3542 -0.23 1.5
--.MNS.Z. 2000-08-03T04:34:44.74 10.0 undecidable manual SG 355 0.6882 -0.25 0.8
--.CRVI.Z. 2000-08-03T04:34:43.76 10.0 undecidable manual PN 88 1.1544 0.95 0.7
--.NRCA.Z. 2000-08-03T04:34:42.95 10.0 undecidable manual PN 12 1.1544 0.02 1.7
--.RFI.Z. 2000-08-03T04:34:41.32 10.0 undecidable manual PG 113 0.999 0.91 0.8
--.PQ9.Z. 2000-08-03T04:34:41.46 10.0 undecidable manual SG 55 0.5661 0.05 0.8
--.AQU.Z. 2000-08-03T04:34:36.72 10.0 undecidable manual PG 35 0.7992 -0.15 2
--.SDI.Z. 2000-08-03T04:34:35.40 10.0 positive manual PG 88 0.777 -1.37 0.7
--.MNS.Z. 2000-08-03T04:34:33.47 10.0 undecidable manual PG 355 0.6882 -1.14 0.6
--.PQ9.Z. 2000-08-03T04:34:31.83 10.0 undecidable manual PG 55 0.5661 -0.71 1.2
--.MA9.Z. 2000-08-03T04:34:26.00 10.0 undecidable manual SG 313 0.0999 0.95 0.4
--.LAV9.Z. 2000-08-03T04:34:24.40 10.0 undecidable manual SG 244 0.0444 0.9 0.4
--.RDP.Z. 2000-08-03T04:34:24.30 10.0 undecidable manual SG 331 0.0666 0.09 0.8
--.MA9.Z. 2000-08-03T04:34:22.80 10.0 negative manual PG 313 0.0999 -0.29 3.7
--.RDP.Z. 2000-08-03T04:34:22.64 10.0 undecidable manual PG 331 0.0666 0.19 2
--.LAV9.Z. 2000-08-03T04:34:21.83 10.0 undecidable manual PG 244 0.0444 -0.37 1.7
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, /tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download