Earthquake with magnitude of ML 2.2 on date 29-08-2020 and time 11:35:31 (UTC) in region 3 km SE Rocca Priora (RM)

A magnitude ML 2.2 earthquake occured in region: 3 km SE Rocca Priora (RM), on

  • 29-08-2020 11:35:31 (UTC)
  • 29-08-2020 13:35:31 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.78, 12.8 at 7 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
Rocca Priora RM 3 11962 11962
San Cesareo RM 5 15153 27115
Monte Compatri RM 6 11978 39093
Lariano RM 6 13432 52525
Colonna RM 7 4287 56812
Rocca di Papa RM 7 17034 73846
Labico RM 8 6379 80225
Zagarolo RM 8 17843 98068
Monte Porzio Catone RM 8 8693 106761
Nemi RM 9 1943 108704
Frascati RM 10 22087 130791
Velletri RM 10 53303 184094
Valmontone RM 10 15959 200053
Palestrina RM 11 21672 221725
Gallicano nel Lazio RM 11 6334 228059
Grottaferrata RM 11 20327 248386
Artena RM 11 14276 262662
Marino RM 11 43026 305688
Castel San Pietro Romano RM 11 902 306590
Genzano di Roma RM 12 23970 330560
Ariccia RM 12 19407 349967
Cave RM 12 11287 361254
Castel Gandolfo RM 12 8997 370251
Albano Laziale RM 13 41715 411966
Lanuvio RM 13 13632 425598
Rocca di Cave RM 15 377 425975
Poli RM 15 2418 428393
Rocca Massima LT 15 1136 429529
Genazzano RM 16 6036 435565
Capranica Prenestina RM 16 351 435916
Ciampino RM 16 38412 474328
Casape RM 16 744 475072
San Gregorio da Sassola RM 17 1619 476691
Cori LT 18 11065 487756
Colleferro RM 18 21595 509351
San Vito Romano RM 20 3273 512624
Pisoniano RM 20 770 513394

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km N of Velletri (53303 inhabitants)
21 Km S of Tivoli (56533 inhabitants)
24 Km NE of Aprilia (73446 inhabitants)
26 Km S of Guidonia Montecelio (88673 inhabitants)
27 Km E of Pomezia (62966 inhabitants)
29 Km E of Roma (2864731 inhabitants)
36 Km N of Latina (125985 inhabitants)
39 Km NE of Anzio (54211 inhabitants)
46 Km E of Fiumicino (78395 inhabitants)
81 Km SW of L'Aquila (69753 inhabitants)
88 Km S of Terni (111501 inhabitants)
90 Km E of Civitavecchia (52991 inhabitants)
91 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 2.2 2020-08-29
11:35:31
41.78 12.8 7 2020-08-29
11:50:50
Sala Sismica INGV-Roma 82438051
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-29 11:35:31 ± 0.15
Latitude 41.78 ± 0.01
Longitude 12.80 ± 0.01
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 82438051

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 612
Semi-minor axis of confidence ellipse (meter) 422
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 310
Circular confidence region, given by single value of horizontal uncertainty (meter) 610
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 157
Number of associated phases, regardless of their use for origin computation 43
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.29138
Number of stations at which the event was observed 37
Number of stations from which data was used for origin computation 9
Magnitude information

ML:2.2

Field Value
Value 2.2
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 82438051
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-29 11:50:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.HAGA.HHZ. 2020-08-29T11:37:26.43 3.0 undecidable manual Sn -3.22 0
IV.MFNL.HHZ. 2020-08-29T11:37:13.66 3.0 undecidable manual Sn -3.19 0
IV.SARZ.HHZ. 2020-08-29T11:37:10.91 3.0 undecidable manual Sn 0.11 0
OX.ACOM.HHZ. 2020-08-29T11:37:01.94 3.0 undecidable manual Sn -2.88 0
IV.PTCC.HHZ. 2020-08-29T11:36:59.54 3.0 undecidable manual Sn -2.11 0
ST.PANI.EHZ. 2020-08-29T11:36:58.64 3.0 undecidable manual Sn -4.79 0
CR.ZAG.BHZ. 2020-08-29T11:36:50.86 3.0 undecidable manual Sn -3.46 0
IV.PANTE.HHZ. 2020-08-29T11:36:45.63 3.0 negative manual Pg 7.52 0
AC.KBN.HHZ. 2020-08-29T11:36:42.67 3.0 negative manual Pg 9.1 0
GU.MGRO.HHZ. 2020-08-29T11:36:41.32 3.0 undecidable manual Pg 16.82 0
ST.CARE.EHZ. 2020-08-29T11:36:35.62 3.0 undecidable manual Pg 12.83 0
IV.MFNL.HHZ. 2020-08-29T11:36:23.24 3.0 undecidable manual Pn 0.4 0
OX.CIMO.HHZ. 2020-08-29T11:36:19.23 3.0 negative manual Pg 4.57 0
IV.CPGN.EHZ. 2020-08-29T11:36:15.76 3.0 undecidable manual Sg 7.7 0
RF.GEPF.HHZ. 2020-08-29T11:36:14.84 3.0 undecidable manual Pn 2.08 0
IV.MAGA.HHZ. 2020-08-29T11:36:12.45 3.0 undecidable manual Pn -3.27 0
IV.NOV.HHZ. 2020-08-29T11:36:11.68 3.0 undecidable manual Pn -8.32 0
IV.CAR1.HHZ. 2020-08-29T11:36:11.14 3.0 undecidable manual Pg 3.17 0
IV.CRE.HHZ. 2020-08-29T11:36:10.04 3.0 undecidable manual Sn 0.42 0
IV.ATFO.HHZ. 2020-08-29T11:36:06.12 3.0 undecidable manual Sg 8.85 0
IV.SBPO.HNZ. 2020-08-29T11:36:06.61 3.0 negative manual Pn 0.43 0
XK.ALB1.HHZ. 2020-08-29T11:36:04.91 3.0 negative manual Pn -7.81 0
IV.RIBO.EHZ.01 2020-08-29T11:35:50.28 3.0 positive manual Pn 1.1 0
IV.TOLF.HHZ. 2020-08-29T11:35:44.02 3.0 positive manual Pg 4.84 0
IV.LRP.EHZ. 2020-08-29T11:35:42.85 3.0 undecidable manual S 1.21 0
IV.CMPR.HHZ. 2020-08-29T11:35:41.31 3.0 undecidable manual Pn -9.28 0
IV.GUAR.HHZ. 2020-08-29T11:35:40.07 3.0 undecidable manual S -0.56 0
IT.RMVT.HGE. 2020-08-29T11:35:38.49 0.1 undecidable manual P 308 0.2914 103 0.04 95
IV.SAMA.EHZ. 2020-08-29T11:35:37.64 0.6 undecidable manual S 271 0.152 114 -0.53 44
IV.LATB.EHZ. 2020-08-29T11:35:37.53 3.0 negative manual P 2.78 0
IV.MTCE.HHE. 2020-08-29T11:35:37.31 0.1 undecidable manual P 351 0.2482 105 -0.21 93
IV.LAV9.HHZ. 2020-08-29T11:35:37.14 0.6 undecidable manual S 216 0.1232 118 -0.05 49
IV.RMP.HHN. 2020-08-29T11:35:35.93 0.3 undecidable manual S 297 0.0755 131 0.25 71
IV.LAV9.HHZ. 2020-08-29T11:35:35.05 0.6 negative manual P 216 0.1232 118 0.13 48
IV.RCAV.EHE. 2020-08-29T11:35:35.04 0.1 undecidable manual P 58 0.1313 117 -0.04 98
IV.SAMA.EHZ. 2020-08-29T11:35:35.35 0.3 undecidable manual P 271 0.152 114 -0.13 72
IV.RDP.HHZ. 2020-08-29T11:35:35.26 0.3 undecidable manual S 255 0.0657 135 -0.14 73
IV.VIVA.HHZ. 2020-08-29T11:35:34.49 0.6 undecidable manual S 215 0.0333 153 -0.17 49
IV.RMP.HHN. 2020-08-29T11:35:34.31 0.6 undecidable manual P 297 0.0755 131 0.27 47
IV.MA9.HHE. 2020-08-29T11:35:34.72 0.1 undecidable manual P 266 0.1025 123 0.21 95
IV.RDP.HHZ. 2020-08-29T11:35:34.07 0.1 positive manual P 255 0.0657 135 0.19 96
IV.VIVA.HHZ. 2020-08-29T11:35:33.43 0.1 negative manual P 215 0.0333 153 -0.03 100
IV.TERO.HHZ. 2020-08-29T11:35:21.21 3.0 negative manual P 0.05 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LAV9.HNE. ML:2.2 0.002965 0.28 AML other m 2020-08-29T11:35:42.08
IV.VIVA.HHE. ML:0 0.014 1.06 AML other m 2020-08-29T11:35:34.56
IV.RDP.HHN. ML:2.6 0.008035 0.5 AML other m 2020-08-29T11:35:35.87
IV.RDP.HHE. ML:2.6 0.007735 0.34 AML other m 2020-08-29T11:35:36.24
IV.LAV9.HNN. ML:2.3 0.003085 0.4 AML other m 2020-08-29T11:35:40.42
IV.LAV9.HHN. ML:2 0.003245 0.42 AML other m 2020-08-29T11:35:40.42
IV.LAV9.HHE. ML:1.9 0.00306 0.28 AML other m 2020-08-29T11:35:42.08
IV.LATB.EHN. ML:0.9 3.555E-5 0.88 AML other m 2020-08-29T11:35:42.33
IV.LATB.EHE. ML:1 3.785E-5 0.54 AML other m 2020-08-29T11:35:43.40
IV.VIVA.HHN. ML:0 0.016350875 0.8 AML other m 2020-08-29T11:35:34.85
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