Earthquake with magnitude of Md 3.2 on date 17-03-1990 and time 21:35:15 (Italy) in region 2 km SE Velletri (RM)

A magnitude Md 3.2 earthquake occured in region: 2 km SE Velletri (RM), on

  • 17-03-1990 20:35:15 (UTC)
  • 17-03-1990 21:35:15 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.675, 12.789 at 4 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
Lariano RM 7 13432 66735
Lanuvio RM 7 13632 80367
Nemi RM 8 1943 82310
Genzano di Roma RM 9 23970 106280
Cisterna di Latina LT 10 36868 143148
Rocca Massima LT 11 1136 144284
Ariccia RM 11 19407 163691
Cori LT 11 11065 174756
Rocca di Papa RM 12 17034 191790
Albano Laziale RM 12 41715 233505
Artena RM 13 14276 247781
Rocca Priora RM 14 11962 259743
Castel Gandolfo RM 14 8997 268740
Aprilia LT 15 73446 342186
Labico RM 15 6379 348565
Marino RM 15 43026 391591
Monte Compatri RM 16 11978 403569
Valmontone RM 16 15959 419528
Grottaferrata RM 16 20327 439855
San Cesareo RM 16 15153 455008
Monte Porzio Catone RM 17 8693 463701
Frascati RM 17 22087 485788
Colonna RM 18 4287 490075
Norma LT 18 3946 494021
Zagarolo RM 19 17843 511864
Colleferro RM 19 21595 533459
Segni RM 20 9159 542618
Cave RM 20 11287 553905

Municipalities with at least 50000 inhabitants

An earthquake occurred to
2 Km SE of Velletri (53303 inhabitants)
15 Km NE of Aprilia (73446 inhabitants)
24 Km E of Pomezia (62966 inhabitants)
25 Km NW of Latina (125985 inhabitants)
28 Km NE of Anzio (54211 inhabitants)
32 Km S of Tivoli (56533 inhabitants)
35 Km SE of Roma (2864731 inhabitants)
37 Km S of Guidonia Montecelio (88673 inhabitants)
47 Km E of Fiumicino (78395 inhabitants)
91 Km SW of L'Aquila (69753 inhabitants)
95 Km SE of Civitavecchia (52991 inhabitants)
99 Km S of Terni (111501 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 3.2
ML-VAX 2.5
1990-03-17
20:35:15
41.675 12.789 4 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 112159
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-03-17 20:35:15 ± 0.333
Latitude 41.6750 ± 0.0176
Longitude 12.7890 ± 0.0209
Depth (km) 4 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 112159

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) 2614.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 169
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 29
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) 0.00089
Epicentral distance of station farthest from the epicenter (degree) 0.02331
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 20
Magnitudes information

Md:3.2

Field Value
Value 3.2
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 112159
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:44:15

ML:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 112159
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 Takeoff_angle Residual Weight
--.CIO.Z. 1990-03-17T20:36:08.69 10.0 undecidable manual SN! 9 0.0138 4.84 0
--.RM8.Z. 1990-03-17T20:36:02.77 10.0 undecidable manual SN! 13 0.0118 4.29 0
--.ASS.Z. 1990-03-17T20:36:00.26 10.0 undecidable manual SN 355 0.0125 -0.01 0.5
--.MGR.Z. 1990-03-17T20:35:59.00 10.0 undecidable manual PN 125 0.0233 1.34 0.2
--.PGD.Z. 1990-03-17T20:35:54.50 10.0 undecidable manual PN 340 0.021 0.4 0.8
--.AOI.Z. 1990-03-17T20:35:50.35 10.0 undecidable manual PN 17 0.0176 1.3 0.2
--.ARV.Z. 1990-03-17T20:35:48.44 10.0 undecidable manual PN 3 0.0164 1.3 0.2
--.AQU.Z. 1990-03-17T20:35:45.92 10.0 undecidable manual SG 33 0.0073 1.55 0.1
--.CIO.Z. 1990-03-17T20:35:43.30 10.0 undecidable manual PN 9 0.0138 -0.19 1.2
--.SOR.Z. 1990-03-17T20:35:43.90 10.0 undecidable manual PN 132 0.0143 -0.07 1.2
--.SDI.Z. 1990-03-17T20:35:42.68 10.0 undecidable manual SG 87 0.0068 0.06 0.6
--.RM8.Z. 1990-03-17T20:35:40.50 10.0 undecidable manual PN 13 0.0118 0.38 1.2
--.ASS.Z. 1990-03-17T20:35:40.28 10.0 undecidable manual PN 355 0.0125 -0.87 0.6
--.MAO.Z. 1990-03-17T20:35:39.95 10.0 undecidable manual PN 301 0.0128 -1.63 0.1
--.DUI.Z. 1990-03-17T20:35:39.54 10.0 undecidable manual PN 90 0.0112 0.38 1.2
--.SGG.Z. 1990-03-17T20:35:39.40 10.0 undecidable manual PN 103 0.011 0.55 1.1
--.ALP.Z. 1990-03-17T20:35:38.81 10.0 undecidable manual PN 27 0.0112 -0.35 1.2
--.AZI.Z. 1990-03-17T20:35:36.20 10.0 undecidable manual SG 56 0.0051 -0.52 0.5
--.MSC.Z. 1990-03-17T20:35:35.00 10.0 undecidable manual PG 118 0.0091 -0.52 1.2
--.RFI.Z. 1990-03-17T20:35:35.33 10.0 undecidable manual PG 112 0.0087 0.53 1.1
--.AQU.Z. 1990-03-17T20:35:31.90 10.0 undecidable manual PG 33 0.0073 -0.88 0.7
--.SDI.Z. 1990-03-17T20:35:30.11 10.0 positive manual PG 87 0.0068 -0.85 1.5
--.AZI.Z. 1990-03-17T20:35:26.72 10.0 positive manual PG 56 0.0051 -0.73 1.8
--.CP9.Z. 1990-03-17T20:35:23.44 10.0 undecidable manual SG 32 0.0019 -0.29 0.5
--.CP9.Z. 1990-03-17T20:35:20.50 10.0 positive manual PG 32 0.0019 0.45 2.5
--.RMP.Z. 1990-03-17T20:35:20.44 10.0 undecidable manual SG 334 0.0013 -0.55 0.4
--.RDP.Z. 1990-03-17T20:35:18.89 10.0 undecidable manual SG 327 0.0009 -0.2 0.6
--.RMP.Z. 1990-03-17T20:35:18.54 10.0 positive manual PG 334 0.0013 0.06 3
--.RDP.Z. 1990-03-17T20:35:17.62 10.0 positive manual PG 327 0.0009 0.24 2.8
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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