Earthquake with magnitude of Md 3.3 on date 23-04-1989 and time 23:32:21 (UTC) in region 2 km S Monte Porzio Catone (RM)

A magnitude Md 3.3 earthquake occured in region: 2 km S Monte Porzio Catone (RM), on

  • 23-04-1989 23:32:21 (UTC)
  • 24-04-1989 01:32:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.7990, 12.7180 at 8 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
Monte Porzio Catone RM 2 8693 8693
Monte Compatri RM 2 11978 20671
Frascati RM 3 22087 42758
Rocca Priora RM 4 11962 54720
Rocca di Papa RM 4 17034 71754
Grottaferrata RM 4 20327 92081
Colonna RM 5 4287 96368
Marino RM 6 43026 139394
San Cesareo RM 7 15153 154547
Castel Gandolfo RM 8 8997 163544
Nemi RM 9 1943 165487
Albano Laziale RM 9 41715 207202
Ariccia RM 10 19407 226609
Ciampino RM 10 38412 265021
Genzano di Roma RM 10 23970 288991
Zagarolo RM 10 17843 306834
Gallicano nel Lazio RM 12 6334 313168
Lariano RM 12 13432 326600
Lanuvio RM 13 13632 340232
Velletri RM 13 53303 393535
Labico RM 14 6379 399914
Palestrina RM 15 21672 421586
Castel San Pietro Romano RM 16 902 422488
Valmontone RM 17 15959 438447
Poli RM 18 2418 440865
Artena RM 18 14276 455141
Cave RM 18 11287 466428
Casape RM 19 744 467172
San Gregorio da Sassola RM 19 1619 468791
Tivoli RM 20 56533 525324
Rocca di Cave RM 20 377 525701

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km NW of Velletri (53303 inhabitants)
20 Km SW of Tivoli (56533 inhabitants)
22 Km E of Roma (2864731 inhabitants)
23 Km S of Guidonia Montecelio (88673 inhabitants)
23 Km NE of Pomezia (62966 inhabitants)
23 Km N of Aprilia (73446 inhabitants)
40 Km N of Anzio (54211 inhabitants)
40 Km E of Fiumicino (78395 inhabitants)
40 Km NW of Latina (125985 inhabitants)
83 Km E of Civitavecchia (52991 inhabitants)
83 Km SW of L'Aquila (69753 inhabitants)
85 Km S of Terni (111501 inhabitants)
85 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 3.3
ML-VAX 2.9
1989-04-23
23:32:21
41.799 12.718 8 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 90429
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-04-23 23:32:21 ± 0.172
Latitude 41.7990 ± 0.0131
Longitude 12.7180 ± 0.0161
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 90429

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) 1974.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 104
Number of associated phases, regardless of their use for origin computation 58
Number of defining phases 58
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.7
Epicentral distance of station closest to the epicenter (degree) 0.00008
Epicentral distance of station farthest from the epicenter (degree) 0.06613
Number of stations at which the event was observed 44
Number of stations from which data was used for origin computation 44
Magnitudes information

Md:3.3

Field Value
Value 3.3
Uncertainty
Num. used stations 7
Type of magnitude Md
Reference to an origin 90429
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:24:50

ML:2.9

Field Value
Value 2.9
Uncertainty
Num. used stations 10
Type of magnitude ML
Reference to an origin 90429
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
--.RBL.Z. 1989-04-23T23:34:23.50 10.0 undecidable manual SN 7 4.6731 -0.6 0.3
--.KHC.Z. 1989-04-23T23:34:09.30 10.0 undecidable manual PN 4 7.3371 0.6 0.6
--.VKA.Z. 1989-04-23T23:34:05.00 10.0 undecidable manual PN 20 6.9375 1.91 0.1
--.KBA.Z. 1989-04-23T23:33:42.00 10.0 negative manual PN 4 5.2836 1.55 0.5
--.CVF.Z. 1989-04-23T23:33:42.90 10.0 undecidable manual SN 286 2.9526 0.32 0.5
--.LRG.Z. 1989-04-23T23:33:35.40 10.0 undecidable manual PN 291 4.9506 -0.43 0.9
--.FRF.Z. 1989-04-23T23:33:33.10 10.0 undecidable manual PN 293 4.7841 -0.48 0.9
--.FVI.Z. 1989-04-23T23:33:32.29 10.0 negative manual PN 0 4.7841 -1.26 0.8
--.LMR.Z. 1989-04-23T23:33:32.90 10.0 undecidable manual PN 290 4.8063 -1.03 0.5
--.RBL.Z. 1989-04-23T23:33:31.20 10.0 negative manual PN 7 4.6731 -0.97 1.2
--.VBY.Z. 1989-04-23T23:33:28.60 10.0 undecidable manual PN! 25 4.1292 4.1 0
--.VOY.Z. 1989-04-23T23:33:27.30 10.0 undecidable manual PN 10 4.3068 0.31 1.1
--.GRI.Z. 1989-04-23T23:33:24.33 10.0 undecidable manual PN 135 4.0848 0.29 1.1
--.BOB.Z. 1989-04-23T23:33:21.17 10.0 undecidable manual PN 322 3.7962 1.21 0.5
--.CZI.Z. 1989-04-23T23:33:18.50 10.0 undecidable manual PN 133 3.6519 0.52 1.1
--.BRT.Z. 1989-04-23T23:33:14.47 10.0 undecidable manual PN 104 3.441 -0.65 1
--.SOR.Z. 1989-04-23T23:33:14.20 10.0 undecidable manual SN 134 1.7205 0.92 0.4
--.BAI.Z. 1989-04-23T23:33:13.00 10.0 positive manual PN 101 3.1857 1.42 0.8
--.ARV.Z. 1989-04-23T23:33:12.40 10.0 undecidable manual SN 5 1.6983 -0.59 0.5
--.CVF.Z. 1989-04-23T23:33:07.70 10.0 undecidable manual PN 286 2.9526 -0.58 1.1
--.CDM.Z. 1989-04-23T23:33:07.00 10.0 undecidable manual PN 103 2.7528 1.38 0.5
--.MME.Z. 1989-04-23T23:33:06.74 10.0 undecidable manual PN 329 2.8083 0.38 1.3
--.SGG.Z. 1989-04-23T23:33:05.40 10.0 undecidable manual SN 107 1.2987 1.91 0.1
--.MGR.Z. 1989-04-23T23:33:05.20 10.0 undecidable manual PN 126 2.7084 0.08 1.5
--.FIR.Z. 1989-04-23T23:33:04.00 10.0 undecidable manual PN! 331 2.2422 5.39 0
--.MAO.Z. 1989-04-23T23:33:04.90 10.0 undecidable manual SN 298 1.3098 1.25 0.3
--.PII.Z. 1989-04-23T23:33:03.70 10.0 undecidable manual PN 320 2.4975 0.9 1
--.ASS.Z. 1989-04-23T23:33:01.87 10.0 undecidable manual SN 357 1.2543 -0.58 0.5
--.SGO.Z. 1989-04-23T23:32:59.49 10.0 undecidable manual PN 121 2.2977 0.05 1.6
--.MSC.Z. 1989-04-23T23:32:59.00 10.0 undecidable manual SN 122 1.11 0.05 0.6
--.PGD.Z. 1989-04-23T23:32:58.55 10.0 undecidable manual PN 340 2.1978 0.59 1.3
--.SFI.Z. 1989-04-23T23:32:57.54 10.0 negative manual PN 343 2.1978 -0.41 2.9
--.TR9.Z. 1989-04-23T23:32:56.60 10.0 undecidable manual PN 110 2.0202 1.02 0.9
--.RFI.Z. 1989-04-23T23:32:56.26 10.0 undecidable manual SN 117 1.0656 -1.58 0.1
--.RSM.Z. 1989-04-23T23:32:56.83 10.0 undecidable manual PN 354 2.1312 -0.28 1.5
--.FG2.Z. 1989-04-23T23:32:54.15 10.0 undecidable manual PN 88 1.8204 1.41 0.5
--.BSS.Z. 1989-04-23T23:32:54.50 10.0 undecidable manual PN 122 1.8759 0.43 1.4
--.ARV.Z. 1989-04-23T23:32:52.55 10.0 undecidable manual PN 5 1.6983 1.35 0.5
--.SOR.Z. 1989-04-23T23:32:50.20 10.0 undecidable manual PN 134 1.7205 -1.16 0.7
--.OVO.Z. 1989-04-23T23:32:50.00 10.0 undecidable manual PN 127 1.5762 0.39 1.5
--.SDI.Z. 1989-04-23T23:32:49.42 10.0 undecidable manual SG 95 0.8214 -0.55 0.5
--.DUI.Z. 1989-04-23T23:32:46.20 10.0 undecidable manual PN 95 1.2987 0.35 1.5
--.SGG.Z. 1989-04-23T23:32:46.00 10.0 undecidable manual PN 107 1.2987 0.29 1.5
--.ASS.Z. 1989-04-23T23:32:45.50 10.0 undecidable manual PN 357 1.2543 -0.06 1.6
--.MAO.Z. 1989-04-23T23:32:44.83 10.0 undecidable manual PN 298 1.3098 -0.98 0.9
--.MSC.Z. 1989-04-23T23:32:41.60 10.0 undecidable manual PN 122 1.11 -1.49 0.4
--.MNS.Z. 1989-04-23T23:32:41.69 10.0 undecidable manual SG 357 0.5883 -0.81 0.4
--.RFI.Z. 1989-04-23T23:32:41.18 10.0 positive manual PN 117 1.0656 -1.27 1.2
--.SDI.Z. 1989-04-23T23:32:36.62 10.0 positive manual PG 95 0.8214 -1.29 1.2
--.AQU.Z. 1989-04-23T23:32:36.62 10.0 undecidable manual PG 42 0.7437 -0.04 1.6
--.MNS.Z. 1989-04-23T23:32:33.13 10.0 undecidable manual PG 357 0.5883 -0.46 1.4
--.AZI.Z. 1989-04-23T23:32:32.83 10.0 positive manual PG 70 0.555 -0.38 2.9
--.CP9.Z. 1989-04-23T23:32:28.28 10.0 undecidable manual SG 70 0.1776 -0.83 0.4
--.CP9.Z. 1989-04-23T23:32:26.28 10.0 positive manual PG 70 0.1776 0.41 2.9
--.RDP.Z. 1989-04-23T23:32:25.30 10.0 undecidable manual SG 181 0.0333 0.62 0.7
--.RMP.Z. 1989-04-23T23:32:24.59 10.0 undecidable manual SG 315 0.0111 0.23 0.6
--.RMP.Z. 1989-04-23T23:32:23.27 10.0 positive manual PG 315 0.0111 0.16 3.2
--.RDP.Z. 1989-04-23T23:32:22.80 10.0 positive manual PG 181 0.0333 -0.51 1.4
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