Earthquake with magnitude of Md 2.0 on date 14-05-1987 and time 13:00:43 (Italy) in region 2 km SE Velletri (RM)

A magnitude Md 2.0 earthquake occured in region: 2 km SE Velletri (RM), on

  • 14-05-1987 11:00:43 (UTC)
  • 14-05-1987 13:00:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.68, 12.79 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.

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 8 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
Cori LT 11 11065 155349
Ariccia RM 11 19407 174756
Rocca di Papa RM 12 17034 191790
Artena RM 12 14276 206066
Albano Laziale RM 13 41715 247781
Rocca Priora RM 13 11962 259743
Castel Gandolfo RM 14 8997 268740
Labico RM 14 6379 275119
Aprilia LT 15 73446 348565
Marino RM 15 43026 391591
Valmontone RM 15 15959 407550
Monte Compatri RM 15 11978 419528
San Cesareo RM 16 15153 434681
Grottaferrata RM 16 20327 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 18 17843 511864
Colleferro RM 19 21595 533459
Segni RM 19 9159 542618
Cave RM 20 11287 553905
Palestrina RM 20 21672 575577

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)
29 Km NE of Anzio (54211 inhabitants)
32 Km S of Tivoli (56533 inhabitants)
35 Km SE of Roma (2864731 inhabitants)
36 Km S of Guidonia Montecelio (88673 inhabitants)
47 Km E of Fiumicino (78395 inhabitants)
90 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
Rev 1000 Md 2.0 1987-05-14
11:00:43
41.68 12.79 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 47049
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-05-14 11:00:43 ± 0.51
Latitude 41.68 ± 0.02
Longitude 12.79 ± 0.01
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 47049

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) 2567.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 299
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00081
Epicentral distance of station farthest from the epicenter (degree) 0.00194
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitude information

Md:2

Field Value
Value 2
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 47049
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:46:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CP9.Z. 1987-05-14T11:00:52.50 10.0 undecidable manual SG 32 0.0019 0.18 0.6
--.RMP.Z. 1987-05-14T11:00:50.00 10.0 undecidable manual SG 332 0.0013 0.25 0.6
--.CP9.Z. 1987-05-14T11:00:48.50 10.0 undecidable manual PG 32 0.0019 -0.2 1.5
--.RMP.Z. 1987-05-14T11:00:47.50 10.0 undecidable manual PG 332 0.0013 0.28 1.4
--.RDP.Z. 1987-05-14T11:00:47.50 10.0 undecidable manual SG 324 0.0008 -0.42 0.4
--.RDP.Z. 1987-05-14T11:00:46.00 10.0 undecidable manual PG 324 0.0008 -0.16 0
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download