Earthquake with magnitude of ML 2.3 on date 29-08-2020 and time 12:59:03 (Italy) in region 4 km NW Lariano (RM)

A magnitude ML 2.3 earthquake occured in region: 4 km NW Lariano (RM), on

  • 29-08-2020 10:59:03 (UTC)
  • 29-08-2020 12:59:03 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.75, 12.8 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Lariano RM 4 13432 13432
Rocca Priora RM 6 11962 25394
Velletri RM 7 53303 78697
Rocca di Papa RM 8 17034 95731
Nemi RM 8 1943 97674
San Cesareo RM 8 15153 112827
Monte Compatri RM 8 11978 124805
Labico RM 8 6379 131184
Artena RM 10 14276 145460
Monte Porzio Catone RM 10 8693 154153
Genzano di Roma RM 10 23970 178123
Colonna RM 10 4287 182410
Valmontone RM 10 15959 198369
Zagarolo RM 10 17843 216212
Lanuvio RM 11 13632 229844
Ariccia RM 11 19407 249251
Frascati RM 12 22087 271338
Grottaferrata RM 12 20327 291665
Albano Laziale RM 12 41715 333380
Marino RM 12 43026 376406
Castel Gandolfo RM 12 8997 385403
Palestrina RM 13 21672 407075
Rocca Massima LT 13 1136 408211
Cave RM 13 11287 419498
Castel San Pietro Romano RM 13 902 420400
Gallicano nel Lazio RM 14 6334 426734
Cori LT 15 11065 437799
Rocca di Cave RM 16 377 438176
Genazzano RM 17 6036 444212
Poli RM 17 2418 446630
Ciampino RM 17 38412 485042
Colleferro RM 17 21595 506637
Cisterna di Latina LT 18 36868 543505
Capranica Prenestina RM 18 351 543856
Casape RM 19 744 544600
San Gregorio da Sassola RM 20 1619 546219
Segni RM 20 9159 555378

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km N of Velletri (53303 inhabitants)
21 Km NE of Aprilia (73446 inhabitants)
24 Km S of Tivoli (56533 inhabitants)
26 Km E of Pomezia (62966 inhabitants)
28 Km S of Guidonia Montecelio (88673 inhabitants)
31 Km SE of Roma (2864731 inhabitants)
33 Km N of Latina (125985 inhabitants)
36 Km NE of Anzio (54211 inhabitants)
47 Km E of Fiumicino (78395 inhabitants)
83 Km SW of L'Aquila (69753 inhabitants)
91 Km S of Terni (111501 inhabitants)
91 Km E of Civitavecchia (52991 inhabitants)
94 Km SE of Viterbo (67173 inhabitants)
Recent and historical Seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the last three days (72 hours)

Earthquakes of the last three days (72 hours)

This map reports the earthquake epicenters located in the 72 hours (3 days) preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the last 90 days

Earthquakes of the last 90 days

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located in the 90 days preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1985

Earthquakes since 1985

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2014

Earthquakes since 1000 AD until 2014

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows 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
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 2.3 2020-08-29
10:59:03
41.75 12.8 10 2020-08-29
11:07:35
Sala Sismica INGV-Roma 82437601
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-29 10:59:03 ± 0.1
Latitude 41.75 ± 0.01
Longitude 12.80 ± 0.01
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 82437601

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 686
Semi-minor axis of confidence ellipse (meter) 548
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 194
Circular confidence region, given by single value of horizontal uncertainty (meter) 690
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 106
Number of associated phases, regardless of their use for origin computation 39
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.31027
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 12
Magnitude information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.4
Num. used stations 36
Type of magnitude ML
Reference to an origin 82437601
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-29 11:07:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ARCI.HHZ. 2020-08-29T10:59:49.70 3.0 undecidable manual S -0.53 0
IV.MNTT.EHZ. 2020-08-29T10:59:48.75 3.0 undecidable manual S 0.07 0
IV.IFOR.HHZ. 2020-08-29T10:59:43.34 3.0 undecidable manual S -2.33 0
IV.MNTT.EHZ. 2020-08-29T10:59:31.43 3.0 positive manual P 2.71 0
IV.ARRO.EHZ. 2020-08-29T10:59:31.93 3.0 undecidable manual S -0.34 0
TV.SF01.EHZ. 2020-08-29T10:59:29.37 3.0 undecidable manual P 0.79 0
IV.SGG.HHZ. 2020-08-29T10:59:28.80 3.0 undecidable manual P 2.86 0
IV.VVLD.HHZ. 2020-08-29T10:59:24.42 3.0 undecidable manual S -0.6 0
IV.CERA.HHZ. 2020-08-29T10:59:20.74 3.0 negative manual P -0.26 0
IV.INTR.HHZ. 2020-08-29T10:59:19.21 3.0 positive manual P -0.64 0
IV.POFI.HHZ. 2020-08-29T10:59:16.37 3.0 negative manual P -0.13 0
IV.FIAM.HHZ. 2020-08-29T10:59:16.10 3.0 positive manual P 1.59 0
IV.VVLD.HHZ. 2020-08-29T10:59:15.35 3.0 positive manual P -0.08 0
IT.RMVT.HGE. 2020-08-29T10:59:15.37 0.1 undecidable manual S 311 0.3103 50 0.13 94
IV.LRP.EHZ. 2020-08-29T10:59:14.94 3.0 negative manual P 0 0
IV.LATB.EHZ. 2020-08-29T10:59:14.05 0.3 undecidable manual S 155 0.2842 50 -0.43 66
IV.PTQR.HHZ. 2020-08-29T10:59:14.11 3.0 negative manual P 0.57 0
IV.SRES.HHZ. 2020-08-29T10:59:14.98 3.0 positive manual P 0.81 0
IV.MTCE.HHZ. 2020-08-29T10:59:13.85 0.3 undecidable manual S 351 0.2752 50 -0.34 68
IV.GUAR.HHZ. 2020-08-29T10:59:11.20 3.0 positive manual P 0.23 0
IV.GIUL.HHZ. 2020-08-29T10:59:11.31 3.0 negative manual P 0.12 0
IT.RMVT.HGE. 2020-08-29T10:59:10.23 0.1 undecidable manual P 311 0.3103 50 0.06 95
IT.RMMM.HGE. 2020-08-29T10:59:10.50 0.1 undecidable manual P 304 0.3103 50 0.33 90
IV.MTCE.HHZ. 2020-08-29T10:59:09.38 0.3 undecidable manual P 351 0.2752 50 -0.18 70
IV.SAMA.EHZ. 2020-08-29T10:59:09.81 0.1 undecidable manual S 281 0.1574 119 -0.31 93
IV.LATB.EHZ. 2020-08-29T10:59:09.45 0.1 undecidable manual P 155 0.2842 50 -0.28 91
IV.ROM9.HNN. 2020-08-29T10:59:09.40 0.3 undecidable manual P 290 0.2248 111 0.81 58
IV.RCAV.EHZ. 2020-08-29T10:59:09.84 0.1 undecidable manual S 49 0.1448 120 0.11 97
IV.MA9.HHZ. 2020-08-29T10:59:08.04 0.1 undecidable manual S 280 0.1061 129 -0.45 91
IV.RMP.HHZ. 2020-08-29T10:59:07.74 0.1 undecidable manual S 311 0.0926 133 -0.36 93
IV.SAMA.EHZ. 2020-08-29T10:59:07.20 0.1 undecidable manual P 281 0.1574 119 -0.01 99
IV.RDP.HHZ. 2020-08-29T10:59:07.37 0.1 undecidable manual S 278 0.0665 142 -0.05 100
IV.RCAV.EHZ. 2020-08-29T10:59:06.99 0.1 undecidable manual P 49 0.1448 120 0 99
IV.RMP.HHZ. 2020-08-29T10:59:06.18 0.1 undecidable manual P 311 0.0926 133 0.13 98
IV.MA9.HHZ. 2020-08-29T10:59:06.40 0.1 undecidable manual P 280 0.1061 129 0.13 98
IV.VIVA.HHZ. 2020-08-29T10:59:06.40 0.1 undecidable manual S 268 0.0216 166 -0.24 97
IV.LAV9.HHZ. 2020-08-29T10:59:06.84 0.1 undecidable manual P 226 0.1043 129 0.6 87
IV.RDP.HHZ. 2020-08-29T10:59:05.91 0.1 undecidable manual P 278 0.0665 142 0.26 96
IV.VIVA.HHZ. 2020-08-29T10:59:05.33 0.1 undecidable manual P 268 0.0216 166 0.13 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VIVA.HHN. ML:3.7 0.0885 0.16 AML other m 2020-08-29T10:59:06.48
IV.VIVA.HHE. ML:3.5 0.05265 0.12 AML other m 2020-08-29T10:59:06.55
IV.RDP.HHE. ML:3.3 0.0335 1.66 AML other m 2020-08-29T10:59:07.14
IV.RDP.HHN. ML:3.4 0.0401 1.5 AML other m 2020-08-29T10:59:08.77
IV.RMP.HHE. ML:3.3 0.0283 1.22 AML other m 2020-08-29T10:59:09.91
IV.RCAV.EHE. ML:2.6 0.00353 0.3 AML other m 2020-08-29T10:59:10.33
IV.LAV9.HHN. ML:3 0.01065 0.52 AML other m 2020-08-29T10:59:10.84
IV.RCAV.EHN. ML:2.6 0.00359 0.22 AML other m 2020-08-29T10:59:11.11
IV.RMP.HHN. ML:3.4 0.03205 0.34 AML other m 2020-08-29T10:59:11.47
IV.LAV9.HHE. ML:3 0.013 0.22 AML other m 2020-08-29T10:59:14.13
IV.MTCE.HHE. ML:1.9 0.0003455 0.4 AML other m 2020-08-29T10:59:14.46
IV.LATB.EHN. ML:1.3 0.000101 0.18 AML other m 2020-08-29T10:59:14.64
IV.MTCE.HHN. ML:1.9 0.0003545 0.4 AML other m 2020-08-29T10:59:14.55
IV.LATB.EHE. ML:1.3 9.335E-5 0.82 AML other m 2020-08-29T10:59:15.19
IV.GUAR.HHE. ML:2.4 0.000759 0.5 AML other m 2020-08-29T10:59:17.88
IV.GIUL.HHE. ML:2.4 0.000835 0.44 AML other m 2020-08-29T10:59:18.59
IV.GIUL.HHN. ML:2.2 0.0005205 0.62 AML other m 2020-08-29T10:59:19.61
IV.GUAR.HHN. ML:2.3 0.00073 0.9 AML other m 2020-08-29T10:59:20.50
IV.PTQR.HHE. ML:2.5 0.000663 0.28 AML other m 2020-08-29T10:59:22.74
IV.PTQR.HHN. ML:2.2 0.000359 0.48 AML other m 2020-08-29T10:59:23.31
IV.SRES.HHE. ML:1.8 0.0001225 0.18 AML other m 2020-08-29T10:59:23.68
IV.VVLD.HHE. ML:2.7 0.000907 0.36 AML other m 2020-08-29T10:59:25.30
IV.VVLD.HNE. ML:2.7 0.000852 0.36 AML other m 2020-08-29T10:59:25.31
IV.VVLD.HHN. ML:2.5 0.0005465 0.78 AML other m 2020-08-29T10:59:25.39
IV.VVLD.HNN. ML:2.5 0.000538 0.78 AML other m 2020-08-29T10:59:25.39
IV.LRP.EHN. ML:1.7 9.52E-5 0.88 AML other m 2020-08-29T10:59:26.37
IV.LRP.EHE. ML:2.2 0.0003075 0.24 AML other m 2020-08-29T10:59:26.50
IV.SRES.HHN. ML:1.8 0.0001305 1.66 AML other m 2020-08-29T10:59:26.95
IV.POFI.HHN. ML:2 0.000137 0.56 AML other m 2020-08-29T10:59:28.53
IV.POFI.HHE. ML:2 0.000156 0.84 AML other m 2020-08-29T10:59:29.61
IV.ARRO.EHN. ML:1.9 8.825E-5 1.04 AML other m 2020-08-29T10:59:35.32
IV.ARRO.EHE. ML:1.9 8.4E-5 0.2 AML other m 2020-08-29T10:59:35.63
IV.INTR.HHN. ML:2.2 0.0001765 1.28 AML other m 2020-08-29T10:59:38.08
IV.INTR.HHE. ML:2.4 0.000235 1.5 AML other m 2020-08-29T10:59:39.02
IV.CERA.HHE. ML:2.1 0.00010835 0.38 AML other m 2020-08-29T10:59:42.64
IV.CERA.HHN. ML:2.1 0.00010845 0.92 AML other m 2020-08-29T10:59:42.98
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Focal Mechanisms

Focal Mechanisms

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol 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
Waveforms Seismic signals in full SEED format Download