Earthquake with magnitude of ML 2.0 on date 16-08-2019 and time 21:35:33 (Italy) in region 4 km NE Colonna (RM)

A magnitude ML 2.0 earthquake occured in region: 4 km NE Colonna (RM), on

  • 16-08-2019 19:35:33 (UTC)
  • 16-08-2019 21:35:33 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.87, 12.77 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
Colonna RM 4 4287 4287
Gallicano nel Lazio RM 5 6334 10621
San Cesareo RM 6 15153 25774
Zagarolo RM 6 17843 43617
Monte Compatri RM 7 11978 55595
Monte Porzio Catone RM 7 8693 64288
Rocca Priora RM 8 11962 76250
San Gregorio da Sassola RM 10 1619 77869
Frascati RM 10 22087 99956
Palestrina RM 11 21672 121628
Casape RM 11 744 122372
Poli RM 11 2418 124790
Tivoli RM 11 56533 181323
Castel San Pietro Romano RM 11 902 182225
Grottaferrata RM 12 20327 202552
Rocca di Papa RM 13 17034 219586
Labico RM 14 6379 225965
Marino RM 14 43026 268991
Castel Madama RM 14 7399 276390
Cave RM 15 11287 287677
Rocca di Cave RM 15 377 288054
Guidonia Montecelio RM 15 88673 376727
Capranica Prenestina RM 15 351 377078
Ciampino RM 16 38412 415490
Valmontone RM 16 15959 431449
Pisoniano RM 16 770 432219
Lariano RM 17 13432 445651
Castel Gandolfo RM 17 8997 454648
San Polo dei Cavalieri RM 17 2992 457640
Nemi RM 17 1943 459583
Marcellina RM 17 7280 466863
Genazzano RM 17 6036 472899
Ciciliano RM 18 1336 474235
San Vito Romano RM 18 3273 477508
Albano Laziale RM 18 41715 519223
Ariccia RM 19 19407 538630
Fonte Nuova RM 19 32562 571192
Sant'Angelo Romano RM 19 5018 576210
Artena RM 19 14276 590486
Vicovaro RM 19 4019 594505
Sambuci RM 19 925 595430
Genzano di Roma RM 19 23970 619400
Cerreto Laziale RM 20 1118 620518

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km S of Tivoli (56533 inhabitants)
15 Km S of Guidonia Montecelio (88673 inhabitants)
20 Km N of Velletri (53303 inhabitants)
24 Km E of Roma (2864731 inhabitants)
31 Km NE of Pomezia (62966 inhabitants)
32 Km NE of Aprilia (73446 inhabitants)
45 Km E of Fiumicino (78395 inhabitants)
46 Km N of Latina (125985 inhabitants)
48 Km N of Anzio (54211 inhabitants)
75 Km SW of L'Aquila (69753 inhabitants)
78 Km S of Terni (111501 inhabitants)
82 Km SE of Viterbo (67173 inhabitants)
84 Km E of Civitavecchia (52991 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
Rev 100 ML 2.0 2019-08-16
19:35:33
41.87 12.77 10 2019-08-16
19:44:21
Sala Sismica INGV-Roma 71555441
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-16 19:35:33 ± 0.08
Latitude 41.87 ± 0.01
Longitude 12.77 ± 0.01
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 71555441

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 737
Semi-minor axis of confidence ellipse (meter) 555
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 274
Circular confidence region, given by single value of horizontal uncertainty (meter) 740
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 116
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.47844
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 10
Magnitude information

ML:2

Field Value
Value 2
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 71555441
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-16 19:44:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MILN.HNZ. 2019-08-16T19:37:04.19 3.0 undecidable manual Sn 5.04 0
GU.ROTM.HHZ. 2019-08-16T19:37:03.46 3.0 undecidable manual Sn -2.69 0
GU.CANO.HHZ. 2019-08-16T19:36:57.03 3.0 undecidable manual Sn -6.8 0
IV.MCRV.HHZ. 2019-08-16T19:36:30.10 3.0 undecidable manual Sg 11.25 0
IV.SBPO.HNZ. 2019-08-16T19:36:28.82 3.0 undecidable manual Sn -0.52 0
GU.BHB.HHZ. 2019-08-16T19:36:26.64 3.0 positive manual Pn 1.31 0
IV.CAVE.HHZ. 2019-08-16T19:36:21.54 3.0 undecidable manual Sn -3.93 0
IV.ZONE.HHZ. 2019-08-16T19:36:21.62 3.0 positive manual Pg 14.87 0
AC.VLO.HHZ. 2019-08-16T19:36:20.46 3.0 positive manual Pn -0.25 0
IV.IOCA.HHZ. 2019-08-16T19:36:20.42 3.0 undecidable manual Sn 3.76 0
IV.MILN.HHZ. 2019-08-16T19:36:10.44 3.0 undecidable manual Pn -0.89 0
IV.EUCT.HNZ. 2019-08-16T19:36:10.17 3.0 positive manual Pn -0.09 0
IV.MCRV.HHZ. 2019-08-16T19:35:57.82 3.0 undecidable manual Pn 9.13 0
IT.VNF1.HGZ. 2019-08-16T19:35:55.94 3.0 undecidable manual Sn -2.92 0
IV.MNTV.HNZ. 2019-08-16T19:35:52.94 3.0 undecidable manual Pn -3.46 0
IV.GIUL.HHZ. 2019-08-16T19:35:50.81 0.3 undecidable manual S 131 0.4784 50 -0.04 69
IV.FIAM.HHZ. 2019-08-16T19:35:50.95 0.3 undecidable manual S 33 0.473 50 0.24 66
IT.MMP1.HGE. 2019-08-16T19:35:48.43 0.6 undecidable manual S 358 0.3786 50 0.53 42
MN.TRI.HHZ. 2019-08-16T19:35:47.01 3.0 negative manual Pn -1.95 0
IT.CSO1.HGE. 2019-08-16T19:35:45.83 0.3 undecidable manual S 46 0.3301 50 -0.63 61
IV.FIAM.HHZ. 2019-08-16T19:35:43.59 0.1 undecidable manual P 33 0.473 50 0 93
IV.GIUL.HHZ. 2019-08-16T19:35:43.61 1.0 negative manual P 131 0.4784 50 -0.07 23
IT.MMP1.HGE. 2019-08-16T19:35:42.17 0.1 undecidable manual P 358 0.3786 50 0.2 91
IV.CERT.HHZ. 2019-08-16T19:35:41.13 0.6 undecidable manual S 64 0.1763 116 -0.27 47
IV.MTCE.HHZ. 2019-08-16T19:35:40.62 0.6 undecidable manual S 352 0.1529 119 -0.01 49
IT.CSO1.HGE. 2019-08-16T19:35:40.99 0.1 undecidable manual P 46 0.3301 50 -0.15 93
IV.SAMA.EHE. 2019-08-16T19:35:40.38 0.3 undecidable manual S 236 0.1601 118 -0.47 67
IV.RDP.HHZ. 2019-08-16T19:35:39.85 0.6 undecidable manual S 202 0.1187 126 0.34 46
IT.VNF1.HGZ. 2019-08-16T19:35:39.50 3.0 negative manual Pn 2.04 0
IV.CERT.HHZ. 2019-08-16T19:35:38.19 0.1 undecidable manual P 64 0.1763 116 -0.04 98
IV.RMP.HHZ. 2019-08-16T19:35:38.11 0.6 undecidable manual S 220 0.0782 137 -0.22 48
IV.SAMA.EHE. 2019-08-16T19:35:37.40 0.1 undecidable manual P 236 0.1601 118 -0.51 89
IV.MTCE.HHZ. 2019-08-16T19:35:37.93 0.1 positive manual P 352 0.1529 119 0.16 96
IV.RDP.HHZ. 2019-08-16T19:35:37.49 0.1 undecidable manual P 202 0.1187 126 0.36 92
IV.VIVA.HHZ. 2019-08-16T19:35:37.64 0.1 undecidable manual P 180 0.1205 125 0.48 90
IV.RMP.HHZ. 2019-08-16T19:35:36.46 0.1 undecidable manual P 220 0.0782 137 0.02 100
IV.MNTT.EHZ. 2019-08-16T19:35:31.03 3.0 undecidable manual S 1.29 0
IV.CESX.HHZ. 2019-08-16T19:35:24.94 3.0 undecidable manual P 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RMP.HHN. ML:2.4 0.00322 0.2 AML other m 2019-08-16T19:35:38.19
IV.RMP.HHE. ML:2.2 0.00258 0.24 AML other m 2019-08-16T19:35:38.22
IV.RDP.HHN. ML:2.3 0.00225 1.48 AML other m 2019-08-16T19:35:40.95
IV.MTCE.HHN. ML:1.8 0.000574 0.34 AML other m 2019-08-16T19:35:41.03
IV.MTCE.HHE. ML:1.7 0.000475 0.32 AML other m 2019-08-16T19:35:41.16
IV.CERT.HHN. ML:1.5 0.0002305 0.6 AML other m 2019-08-16T19:35:41.98
IV.RDP.HHE. ML:2.1 0.001275 0.38 AML other m 2019-08-16T19:35:42.19
IV.CERT.HHE. ML:1.7 0.0003755 0.72 AML other m 2019-08-16T19:35:42.53
IV.VIVA.HHE. ML:2.2 0.00169 0.32 AML other m 2019-08-16T19:35:44.39
IV.VIVA.HHN. ML:2.2 0.00156 0.3 AML other m 2019-08-16T19:35:45.29
IV.FIAM.HHN. ML:1 2.655E-5 1.54 AML other m 2019-08-16T19:35:51.83
IV.GIUL.HHE. ML:1.2 3.575E-5 1.46 AML other m 2019-08-16T19:35:51.15
IV.GIUL.HHN. ML:1.2 3.795E-5 0.72 AML other m 2019-08-16T19:35:54.26
IV.FIAM.HHE. ML:0.9 2.06E-5 0.64 AML other m 2019-08-16T19:36:02.31
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