Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.2 on date 31-05-1989 and time 17:30:47 (UTC) in region 2 km S San Cesareo (RM)

A magnitude Md 2.2 earthquake occured in region: 2 km S San Cesareo (RM), on

  • 31-05-1989 17:30:47 (UTC)
  • 31-05-1989 19:30:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.8020, 12.7970 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
San Cesareo RM 2 15153 15153
Rocca Priora RM 3 11962 27115
Monte Compatri RM 5 11978 39093
Zagarolo RM 5 17843 56936
Colonna RM 5 4287 61223
Monte Porzio Catone RM 7 8693 69916
Labico RM 8 6379 76295
Gallicano nel Lazio RM 8 6334 82629
Rocca di Papa RM 9 17034 99663
Lariano RM 9 13432 113095
Palestrina RM 9 21672 134767
Frascati RM 10 22087 156854
Castel San Pietro Romano RM 10 902 157756
Valmontone RM 10 15959 173715
Grottaferrata RM 11 20327 194042
Nemi RM 11 1943 195985
Cave RM 11 11287 207272
Marino RM 12 43026 250298
Artena RM 12 14276 264574
Poli RM 13 2418 266992
Velletri RM 13 53303 320295
Rocca di Cave RM 13 377 320672
Castel Gandolfo RM 14 8997 329669
Genzano di Roma RM 14 23970 353639
Ariccia RM 14 19407 373046
Casape RM 14 744 373790
Albano Laziale RM 14 41715 415505
San Gregorio da Sassola RM 15 1619 417124
Capranica Prenestina RM 15 351 417475
Genazzano RM 15 6036 423511
Lanuvio RM 16 13632 437143
Ciampino RM 16 38412 475555
Rocca Massima LT 17 1136 476691
Pisoniano RM 18 770 477461
San Vito Romano RM 18 3273 480734
Tivoli RM 18 56533 537267
Colleferro RM 19 21595 558862

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km N of Velletri (53303 inhabitants)
18 Km S of Tivoli (56533 inhabitants)
23 Km S of Guidonia Montecelio (88673 inhabitants)
26 Km NE of Aprilia (73446 inhabitants)
28 Km E of Roma (2864731 inhabitants)
28 Km NE of Pomezia (62966 inhabitants)
38 Km N of Latina (125985 inhabitants)
42 Km NE of Anzio (54211 inhabitants)
47 Km E of Fiumicino (78395 inhabitants)
79 Km SW of L'Aquila (69753 inhabitants)
85 Km S of Terni (111501 inhabitants)
89 Km E of Civitavecchia (52991 inhabitants)
89 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 2.2
ML-VAX 1.5 		1989-05-31
17:30:47		 41.802 12.797 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 92439
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-05-31 17:30:47 ± 0.256
Latitude 41.8020 ± 0.0164
Longitude 12.7970 ± 0.0180
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 92439

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) 2355.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 137
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
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) 0.00057
Epicentral distance of station farthest from the epicenter (degree) 0.00680
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

Md:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 92439
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:26:41

ML:1.5

Field Value
Value 1.5
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 92439
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. 1989-05-31T17:31:16.11 10.0 undecidable manual SG 96 0.7548 1.07 0
--.MNS.Z. 1989-05-31T17:31:09.89 10.0 undecidable manual SG 351 0.5883 0.38 0.4
--.SDI.Z. 1989-05-31T17:31:03.18 10.0 undecidable manual PG 96 0.7548 -0.32 1
--.MNS.Z. 1989-05-31T17:30:59.81 10.0 undecidable manual PG 351 0.5883 -0.5 0.8
--.RDP.Z. 1989-05-31T17:30:51.38 10.0 undecidable manual SG 234 0.0666 0.31 0.6
--.RMP.Z. 1989-05-31T17:30:51.36 10.0 undecidable manual SG 277 0.0666 0.38 0.5
--.RDP.Z. 1989-05-31T17:30:49.19 10.0 undecidable manual PG 234 0.0666 -0.46 1.1
--.RMP.Z. 1989-05-31T17:30:49.75 10.0 positive manual PG 277 0.0666 0.14 3.7
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