Earthquake with magnitude of ML 1.8 on date 16-08-2019 and time 21:35:33 (Italy) in region 4 km N Colonna (RM)

A magnitude ML 1.8 earthquake occured in region: 4 km N 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, 12.76 at 10 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
Colonna RM 4 4287 4287
Gallicano nel Lazio RM 5 6334 10621
San Cesareo RM 6 15153 25774
Zagarolo RM 7 17843 43617
Monte Porzio Catone RM 7 8693 52310
Monte Compatri RM 7 11978 64288
Rocca Priora RM 8 11962 76250
Frascati RM 10 22087 98337
San Gregorio da Sassola RM 11 1619 99956
Tivoli RM 11 56533 156489
Palestrina RM 11 21672 178161
Casape RM 11 744 178905
Poli RM 11 2418 181323
Castel San Pietro Romano RM 12 902 182225
Grottaferrata RM 12 20327 202552
Rocca di Papa RM 13 17034 219586
Marino RM 14 43026 262612
Labico RM 14 6379 268991
Guidonia Montecelio RM 15 88673 357664
Ciampino RM 15 38412 396076
Castel Madama RM 15 7399 403475
Cave RM 15 11287 414762
Rocca di Cave RM 16 377 415139
Capranica Prenestina RM 16 351 415490
Castel Gandolfo RM 16 8997 424487
Valmontone RM 17 15959 440446
Nemi RM 17 1943 442389
Lariano RM 17 13432 455821
Pisoniano RM 17 770 456591
San Polo dei Cavalieri RM 17 2992 459583
Marcellina RM 18 7280 466863
Albano Laziale RM 18 41715 508578
Ariccia RM 18 19407 527985
Genazzano RM 18 6036 534021
Ciciliano RM 18 1336 535357
Fonte Nuova RM 18 32562 567919
San Vito Romano RM 19 3273 571192
Sant'Angelo Romano RM 19 5018 576210
Genzano di Roma RM 19 23970 600180
Artena RM 20 14276 614456
Vicovaro RM 20 4019 618475
Sambuci RM 20 925 619400

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km SW of Tivoli (56533 inhabitants)
15 Km S of Guidonia Montecelio (88673 inhabitants)
20 Km N of Velletri (53303 inhabitants)
23 Km E of Roma (2864731 inhabitants)
31 Km NE of Pomezia (62966 inhabitants)
32 Km N 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)
81 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
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 1000 ML 1.8 2019-08-16
19:35:33
41.87 12.76 10 2019-11-13
14:30:58
Bollettino Sismico Italiano INGV 71654321
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 ± 0.1
Latitude 41.87 ± 0.00
Longitude 12.76 ± 0.01
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 71654321

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 806
Semi-minor axis of confidence ellipse (meter) 433
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 286
Circular confidence region, given by single value of horizontal uncertainty (meter) 810
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 121
Number of associated phases, regardless of their use for origin computation 41
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.48294
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.4
Num. used stations 14
Type of magnitude ML
Reference to an origin 71654321
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-08-21 07:56:52

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.EUCT.HNZ. 2019-08-16T19:36:10.17 3.0 positive manual Pn -0.09 0
IV.MILN.HHZ. 2019-08-16T19:36:10.44 3.0 undecidable manual Pn -0.89 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. 2019-08-16T19:35:51.55 0.3 undecidable manual S 130 0.4829 50 0.85 56
IV.FIAM.HHZ. 2019-08-16T19:35:50.89 0.6 undecidable manual S 34 0.4784 50 0.34 44
IT.MMP1.HGE. 2019-08-16T19:35:48.43 3.0 undecidable manual S 0.53 0
MN.TRI.HHZ. 2019-08-16T19:35:47.01 3.0 negative manual Pn -1.95 0
IV.LATB.EHZ. 2019-08-16T19:35:47.84 0.3 undecidable manual S 158 0.4056 50 -0.54 64
IT.CSO1.HGE. 2019-08-16T19:35:45.83 3.0 undecidable manual S -0.63 0
IV.FIAM.HHZ. 2019-08-16T19:35:43.48 0.3 undecidable manual P 34 0.4784 50 0.03 71
IV.GIUL.HHZ. 2019-08-16T19:35:43.38 0.3 undecidable manual P 130 0.4829 50 -0.14 69
IT.MMP1.HGE. 2019-08-16T19:35:42.17 3.0 undecidable manual P 0.2 0
IV.CERT.HHZ. 2019-08-16T19:35:41.10 0.3 undecidable manual S 64 0.1835 117 -0.54 67
IV.LATB.EHZ. 2019-08-16T19:35:41.80 0.1 undecidable manual P 158 0.4056 50 -0.4 89
IT.CSO1.HGE. 2019-08-16T19:35:40.99 3.0 undecidable manual P -0.15 0
IV.MTCE.HHZ. 2019-08-16T19:35:40.73 0.6 undecidable manual S 355 0.1529 121 0.1 50
IV.SAMA.EHE. 2019-08-16T19:35:40.39 0.1 undecidable manual S 234 0.1529 121 -0.23 97
IV.RDP.HHZ. 2019-08-16T19:35:39.55 0.1 undecidable manual S 198 0.1151 129 0.12 100
IV.VIVA.HHZ. 2019-08-16T19:35:39.78 0.1 undecidable manual S 176 0.1196 128 0.22 97
IT.VNF1.HGZ. 2019-08-16T19:35:39.50 3.0 negative manual Pn 2.04 0
IV.CERT.HHZ. 2019-08-16T19:35:38.20 0.1 undecidable manual P 64 0.1835 117 -0.09 99
IV.SAMA.EHE. 2019-08-16T19:35:37.65 0.1 undecidable manual P 234 0.1529 121 -0.06 100
IV.RMP.HHZ. 2019-08-16T19:35:37.99 0.3 undecidable manual S 216 0.0728 142 -0.26 73
IV.RDP.HHZ. 2019-08-16T19:35:37.11 0.3 undecidable manual P 198 0.1151 129 0.09 75
IV.VIVA.HHZ. 2019-08-16T19:35:37.38 0.1 undecidable manual P 176 0.1196 128 0.28 96
IV.MTCE.HHZ. 2019-08-16T19:35:37.86 0.1 undecidable manual P 355 0.1529 121 0.15 98
IV.RMP.HHZ. 2019-08-16T19:35:36.55 0.1 undecidable manual P 216 0.0728 142 0.2 99
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:2.3 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:1.8 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