Earthquake with magnitude of ML 1.7 on date 26-08-2019 and time 01:06:20 (Italy) in region 4 km NW Colonna (RM)

A magnitude ML 1.7 earthquake occured in region: 4 km NW Colonna (RM), on

  • 25-08-2019 23:06:20 (UTC)
  • 26-08-2019 01:06:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.87, 12.72 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
Monte Porzio Catone RM 6 8693 12980
Monte Compatri RM 7 11978 24958
Frascati RM 8 22087 47045
San Cesareo RM 8 15153 62198
Gallicano nel Lazio RM 8 6334 68532
Rocca Priora RM 9 11962 80494
Zagarolo RM 10 17843 98337
Grottaferrata RM 10 20327 118664
Rocca di Papa RM 12 17034 135698
Marino RM 12 43026 178724
Ciampino RM 12 38412 217136
Tivoli RM 13 56533 273669
San Gregorio da Sassola RM 14 1619 275288
Palestrina RM 14 21672 296960
Casape RM 14 744 297704
Castel Gandolfo RM 15 8997 306701
Poli RM 15 2418 309119
Castel San Pietro Romano RM 15 902 310021
Guidonia Montecelio RM 15 88673 398694
Albano Laziale RM 16 41715 440409
Nemi RM 16 1943 442352
Labico RM 16 6379 448731
Ariccia RM 17 19407 468138
Fonte Nuova RM 17 32562 500700
Castel Madama RM 17 7399 508099
Lariano RM 18 13432 521531
Genzano di Roma RM 18 23970 545501
Cave RM 18 11287 556788
Rocca di Cave RM 19 377 557165
Sant'Angelo Romano RM 19 5018 562183
Marcellina RM 19 7280 569463
San Polo dei Cavalieri RM 19 2992 572455
Valmontone RM 19 15959 588414
Capranica Prenestina RM 19 351 588765
Mentana RM 20 22921 611686
Roma RM 20 2864731 3476417

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km SW of Tivoli (56533 inhabitants)
15 Km S of Guidonia Montecelio (88673 inhabitants)
20 Km E of Roma (2864731 inhabitants)
21 Km N of Velletri (53303 inhabitants)
28 Km NE of Pomezia (62966 inhabitants)
31 Km N of Aprilia (73446 inhabitants)
41 Km E of Fiumicino (78395 inhabitants)
47 Km NW of Latina (125985 inhabitants)
47 Km N of Anzio (54211 inhabitants)
78 Km S of Terni (111501 inhabitants)
78 Km SW of L'Aquila (69753 inhabitants)
80 Km SE of Viterbo (67173 inhabitants)
81 Km E of Civitavecchia (52991 inhabitants)
Recent and historical Seismicity
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 100 ML 1.7 2019-08-25
23:06:20
41.87 12.72 10 2019-08-25
23:18:48
Sala Sismica INGV-Roma 71809511
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-25 23:06:20 ± 0.31
Latitude 41.87 ± 0.01
Longitude 12.72 ± 0.02
Depth (km) 10 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 71809511

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1675
Semi-minor axis of confidence ellipse (meter) 931
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 243
Circular confidence region, given by single value of horizontal uncertainty (meter) 1680
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 151
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.41
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.41369
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 71809511
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-25 23:18:48
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.GRAM.HHZ. 2019-08-25T23:06:47.69 3.0 undecidable manual Pn 0.19 0
IV.OFFI.HHZ. 2019-08-25T23:06:41.72 3.0 undecidable manual S -0.43 0
IV.LATB.EHE. 2019-08-25T23:06:34.35 0.3 undecidable manual S 154 0.4137 50 -0.78 70
IV.FIAM.HHZ. 2019-08-25T23:06:29.39 3.0 undecidable manual S -0.64 0
IV.LATB.EHE. 2019-08-25T23:06:28.17 0.3 undecidable manual P 154 0.4137 50 -0.61 70
IV.LAV9.HNZ. 2019-08-25T23:06:28.35 0.3 undecidable manual S 185 0.1898 115 0.22 72
IT.MMP1.HGE. 2019-08-25T23:06:27.87 0.6 undecidable manual P 3 0.3822 50 -0.37 49
IV.OFFI.HHZ. 2019-08-25T23:06:26.59 3.0 undecidable manual P 0.64 0
IV.SAMA.HHZ. 2019-08-25T23:06:26.35 0.6 undecidable manual S 228 0.1295 124 0.25 52
IV.VIVA.HHZ. 2019-08-25T23:06:25.95 0.3 undecidable manual S 163 0.1223 125 0.09 77
IV.RMP.HHZ. 2019-08-25T23:06:24.05 0.3 undecidable manual S 195 0.0576 146 -0.06 72
IV.LAV9.HNZ. 2019-08-25T23:06:24.91 0.3 undecidable manual P 185 0.1898 115 0.17 73
IV.VIVA.HHZ. 2019-08-25T23:06:24.15 0.3 undecidable manual P 163 0.1223 125 0.72 66
IV.SAMA.HHZ. 2019-08-25T23:06:23.85 0.6 undecidable manual P 228 0.1295 124 0.29 50
IV.RMP.HHZ. 2019-08-25T23:06:22.31 0.1 positive manual P 195 0.0576 146 -0.1 100
IV.GAVE.EHZ. 2019-08-25T23:06:14.49 3.0 negative manual P 0.96 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RMP.HHE. ML:1.6 0.00061586 0.128 AML other m 2019-08-25T23:06:24.20
IV.RMP.HHN. ML:1.7 0.00083382215 0.1792 AML other m 2019-08-25T23:06:24.13
IV.SAMA.HHE. ML:1.1 0.00012491175 0.1024 AML other m 2019-08-25T23:06:28.22
IV.SAMA.HHN. ML:0.9 7.7923275E-5 0.1664 AML other m 2019-08-25T23:06:29.20
IV.VIVA.HHE. ML:1.6 0.0003957972 0.3456 AML other m 2019-08-25T23:06:34.57
IV.VIVA.HHN. ML:1.7 0.0004959339 0.3712 AML other m 2019-08-25T23:06:31.33
IV.LAV9.HNE. ML:1.8 0.0003946761 0.3584 AML other m 2019-08-25T23:06:33.66
IV.LAV9.HNN. ML:1.7 0.00036424415 0.4352 AML other m 2019-08-25T23:06:31.58
IV.LAV9.HHE. ML:1.7 0.0003616445 0.3584 AML other m 2019-08-25T23:06:33.64
IV.LAV9.HHN. ML:1.6 0.0003008099 0.2816 AML other m 2019-08-25T23:06:31.58
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download