Earthquake with magnitude of ML 2.1 on date 29-08-2020 and time 00:00:31 (Italy) in region 4 km NW Lariano (RM)

A magnitude ML 2.1 earthquake occured in region: 4 km NW Lariano (RM), on

  • 28-08-2020 22:00:31 (UTC)
  • 29-08-2020 00:00:31 (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 5 11962 25394
Rocca di Papa RM 7 17034 42428
Velletri RM 8 53303 95731
San Cesareo RM 8 15153 110884
Nemi RM 8 1943 112827
Monte Compatri RM 8 11978 124805
Labico RM 8 6379 131184
Monte Porzio Catone RM 10 8693 139877
Colonna RM 10 4287 144164
Genzano di Roma RM 10 23970 168134
Zagarolo RM 10 17843 185977
Artena RM 10 14276 200253
Valmontone RM 11 15959 216212
Ariccia RM 11 19407 235619
Frascati RM 11 22087 257706
Lanuvio RM 11 13632 271338
Grottaferrata RM 11 20327 291665
Marino RM 12 43026 334691
Albano Laziale RM 12 41715 376406
Castel Gandolfo RM 12 8997 385403
Palestrina RM 12 21672 407075
Gallicano nel Lazio RM 13 6334 413409
Rocca Massima LT 13 1136 414545
Castel San Pietro Romano RM 13 902 415447
Cave RM 13 11287 426734
Cori LT 16 11065 437799
Rocca di Cave RM 16 377 438176
Poli RM 17 2418 440594
Ciampino RM 17 38412 479006
Genazzano RM 17 6036 485042
Colleferro RM 18 21595 506637
Capranica Prenestina RM 18 351 506988
Cisterna di Latina LT 18 36868 543856
Casape RM 19 744 544600
San Gregorio da Sassola RM 20 1619 546219

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km N of Velletri (53303 inhabitants)
22 Km NE of Aprilia (73446 inhabitants)
23 Km S of Tivoli (56533 inhabitants)
26 Km E of Pomezia (62966 inhabitants)
28 Km S of Guidonia Montecelio (88673 inhabitants)
30 Km SE of Roma (2864731 inhabitants)
33 Km N of Latina (125985 inhabitants)
37 Km NE of Anzio (54211 inhabitants)
46 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)
93 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 past 72 hours (3 days) from the time this page has been generated. 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 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 2.1 2020-08-28
22:00:31
41.75 12.8 11 2020-08-28
22:11:35
Sala Sismica INGV-Roma 82419741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-28 22:00:31 ± 0.07
Latitude 41.75 ± 0.00
Longitude 12.80 ± 0.01
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 82419741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 530
Semi-minor axis of confidence ellipse (meter) 527
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 7
Circular confidence region, given by single value of horizontal uncertainty (meter) 530
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 70
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.56657
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 12
Magnitude information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 26
Type of magnitude ML
Reference to an origin 82419741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-28 22:11:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.APEC.HHZ. 2020-08-28T22:01:29.10 3.0 undecidable manual Sg 3.71 0
IV.FRON.EHZ. 2020-08-28T22:01:00.55 3.0 undecidable manual Pn -0.24 0
IV.VAGA.HHZ. 2020-08-28T22:00:54.05 3.0 undecidable manual P 2.08 0
IV.VVLD.HHZ. 2020-08-28T22:00:53.47 3.0 undecidable manual S -0.36 0
IV.CERA.HHZ. 2020-08-28T22:00:49.02 3.0 positive manual P -0.19 0
IV.MCI.EHZ. 2020-08-28T22:00:47.17 3.0 negative manual P 0.02 0
IV.INTR.HHZ. 2020-08-28T22:00:47.78 3.0 positive manual P -0.53 0
IV.ARRO.EHZ. 2020-08-28T22:00:47.70 3.0 undecidable manual P 0.02 0
IV.GIUL.HHZ. 2020-08-28T22:00:46.57 0.3 undecidable manual S 120 0.3939 50 0.58 61
IV.GUAR.HHZ. 2020-08-28T22:00:45.65 0.3 undecidable manual S 84 0.3867 50 -0.12 68
IV.TOLF.HHZ. 2020-08-28T22:00:45.25 3.0 undecidable manual P 0.37 0
IV.VVLD.HHZ. 2020-08-28T22:00:43.78 3.0 negative manual P -0.13 0
IV.MTCE.HHZ. 2020-08-28T22:00:42.45 0.3 undecidable manual S 351 0.2716 50 0.08 70
IV.PTQR.HHZ. 2020-08-28T22:00:42.27 3.0 positive manual P 0.24 0
IV.LATB.EHZ. 2020-08-28T22:00:42.55 0.3 undecidable manual S 154 0.2878 50 -0.3 67
IV.FIAM.HHZ. 2020-08-28T22:00:42.82 0.3 undecidable manual P 25 0.5666 50 -0.1 66
IV.GUAR.HHZ. 2020-08-28T22:00:39.66 0.3 undecidable manual P 84 0.3867 50 -0.18 67
IV.GIUL.HHZ. 2020-08-28T22:00:39.87 0.1 undecidable manual P 120 0.3939 50 -0.1 91
IV.RCAV.EHZ. 2020-08-28T22:00:38.50 0.3 undecidable manual S 50 0.1448 123 0.1 72
IV.SAMA.EHZ. 2020-08-28T22:00:38.31 0.3 undecidable manual S 280 0.1547 121 -0.4 67
IV.LATB.EHZ. 2020-08-28T22:00:37.90 0.1 undecidable manual P 154 0.2878 50 -0.25 90
IV.MTCE.HHZ. 2020-08-28T22:00:37.83 0.3 undecidable manual P 351 0.2716 50 -0.05 71
IV.LAV9.HNZ. 2020-08-28T22:00:37.26 0.3 undecidable manual S 224 0.1052 132 0.07 73
IV.RDP.HHZ. 2020-08-28T22:00:36.01 0.3 undecidable manual S 276 0.0648 146 -0.14 72
IV.RMP.HHZ. 2020-08-28T22:00:36.67 0.3 undecidable manual S 310 0.0899 137 -0.08 73
IV.RCAV.EHZ. 2020-08-28T22:00:35.59 0.1 undecidable manual P 50 0.1448 123 0.01 98
IV.MA9.HHZ. 2020-08-28T22:00:35.41 0.3 undecidable manual P 279 0.1034 132 0.55 65
IV.SAMA.EHZ. 2020-08-28T22:00:35.76 0.1 undecidable manual P 280 0.1547 121 -0.01 97
IV.LAV9.HNZ. 2020-08-28T22:00:35.50 0.3 undecidable manual P 224 0.1052 132 0.62 63
IV.RMP.HHZ. 2020-08-28T22:00:34.78 0.1 undecidable manual P 310 0.0899 137 0.15 96
IV.VIVA.HHZ. 2020-08-28T22:00:34.90 0.3 undecidable manual S 260 0.0198 168 -0.56 66
IV.RDP.HHZ. 2020-08-28T22:00:34.48 0.1 undecidable manual P 276 0.0648 146 0.19 95
IV.VIVA.HHZ. 2020-08-28T22:00:33.88 0.1 undecidable manual P 260 0.0198 168 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VIVA.HHE. ML:3.3 0.03651132 0.1408 AML other m 2020-08-28T22:00:35.08
IV.VIVA.HHN. ML:3.4 0.043076655 0.2432 AML other m 2020-08-28T22:00:35.01
IV.RDP.HHE. ML:2.8 0.0093209843 0.1408 AML other m 2020-08-28T22:00:36.74
IV.RDP.HHN. ML:3 0.01584985 0.192 AML other m 2020-08-28T22:00:36.73
IV.RMP.HHE. ML:2.9 0.0104280355 0.1536 AML other m 2020-08-28T22:00:37.22
IV.RMP.HHN. ML:3.1 0.016039565 0.448 AML other m 2020-08-28T22:00:40.10
IV.RCAV.EHE. ML:2.4 0.002351028 0.2304 AML other m 2020-08-28T22:00:38.87
IV.RCAV.EHN. ML:2.5 0.002614947 0.1792 AML other m 2020-08-28T22:00:39.44
IV.MTCE.HHE. ML:1.6 0.0001837608 0.384 AML other m 2020-08-28T22:00:47.16
IV.MTCE.HHN. ML:1.7 0.00022111365 0.384 AML other m 2020-08-28T22:00:46.74
IV.LATB.EHE. ML:1.2 6.5691385E-5 0.2176 AML other m 2020-08-28T22:00:45.20
IV.LATB.EHN. ML:1 4.9237405E-5 0.1408 AML other m 2020-08-28T22:00:43.16
IV.GUAR.HHE. ML:2.2 0.0004709152 0.256 AML other m 2020-08-28T22:00:49.30
IV.GUAR.HHN. ML:2.1 0.0004249272 0.256 AML other m 2020-08-28T22:00:46.95
IV.GIUL.HHE. ML:2.2 0.0004765948 0.3584 AML other m 2020-08-28T22:00:47.10
IV.GIUL.HHN. ML:2.1 0.00037781835 0.1664 AML other m 2020-08-28T22:00:47.25
IV.PTQR.HHE. ML:2.2 0.00032997995 0.3968 AML other m 2020-08-28T22:00:51.25
IV.PTQR.HHN. ML:2.1 0.00026612885 0.2304 AML other m 2020-08-28T22:00:51.25
IV.FIAM.HHE. ML:1.5 5.942652E-5 0.5376 AML other m 2020-08-28T22:01:03.13
IV.FIAM.HHN. ML:1.5 6.505643E-5 0.512 AML other m 2020-08-28T22:00:58.51
IV.VVLD.HHE. ML:2.3 0.0003400019 0.3968 AML other m 2020-08-28T22:00:53.82
IV.VVLD.HHN. ML:2.1 0.0002212066 0.3328 AML other m 2020-08-28T22:00:55.28
IV.VVLD.HNE. ML:2.2 0.000287146 0.3712 AML other m 2020-08-28T22:00:54.03
IV.VVLD.HNN. ML:2.1 0.00021442596 0.3328 AML other m 2020-08-28T22:00:55.45
IV.TOLF.HHE. ML:1.9 0.00011671781 0.256 AML other m 2020-08-28T22:00:55.72
IV.TOLF.HHN. ML:1.9 0.000120023365 0.2304 AML other m 2020-08-28T22:00:59.68
IV.MCI.EHE. ML:2.3 0.00022210455 0.2432 AML other m 2020-08-28T22:01:02.36
IV.MCI.EHN. ML:2.2 0.0001640228 0.2176 AML other m 2020-08-28T22:01:03.32
IV.ARRO.EHE. ML:1.7 5.8216985E-5 0.192 AML other m 2020-08-28T22:01:04.29
IV.ARRO.EHN. ML:1.8 6.9003075E-5 0.1664 AML other m 2020-08-28T22:01:04.82
IV.INTR.HHE. ML:2 9.390796E-5 0.4608 AML other m 2020-08-28T22:01:07.55
IV.INTR.HHN. ML:2 9.2817645E-5 0.3456 AML other m 2020-08-28T22:01:05.08
IV.CERA.HHE. ML:1.8 6.36253E-5 0.4864 AML other m 2020-08-28T22:01:11.16
IV.CERA.HHN. ML:1.8 6.052269E-5 0.4096 AML other m 2020-08-28T22:01:08.39
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