ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of ML 1.7 on date 25-03-2019 and time 01:09:42 (Italy) in region 3 km W Colonna (RM)

A magnitude ML 1.7 earthquake occured in region: 3 km W Colonna (RM), on

  • 25-03-2019 00:09:42 (UTC)
  • 25-03-2019 01:09:42 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.84, 12.72 at 11 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 3 4287 4287
Monte Porzio Catone RM 3 8693 12980
Monte Compatri RM 4 11978 24958
Frascati RM 5 22087 47045
Rocca Priora RM 7 11962 59007
San Cesareo RM 7 15153 74160
Grottaferrata RM 8 20327 94487
Gallicano nel Lazio RM 9 6334 100821
Zagarolo RM 9 17843 118664
Rocca di Papa RM 9 17034 135698
Marino RM 10 43026 178724
Ciampino RM 11 38412 217136
Castel Gandolfo RM 12 8997 226133
Nemi RM 14 1943 228076
Albano Laziale RM 14 41715 269791
Palestrina RM 14 21672 291463
Ariccia RM 14 19407 310870
Castel San Pietro Romano RM 14 902 311772
Tivoli RM 15 56533 368305
San Gregorio da Sassola RM 15 1619 369924
Poli RM 15 2418 372342
Labico RM 15 6379 378721
Casape RM 15 744 379465
Genzano di Roma RM 16 23970 403435
Lariano RM 16 13432 416867
Guidonia Montecelio RM 17 88673 505540
Cave RM 18 11287 516827
Valmontone RM 18 15959 532786
Velletri RM 18 53303 586089
Lanuvio RM 18 13632 599721
Rocca di Cave RM 19 377 600098
Fonte Nuova RM 19 32562 632660
Castel Madama RM 19 7399 640059
Capranica Prenestina RM 19 351 640410
Artena RM 20 14276 654686

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km SW of Tivoli (56533 inhabitants)
17 Km S of Guidonia Montecelio (88673 inhabitants)
18 Km N of Velletri (53303 inhabitants)
20 Km E of Roma (2864731 inhabitants)
27 Km NE of Pomezia (62966 inhabitants)
29 Km N of Aprilia (73446 inhabitants)
41 Km E of Fiumicino (78395 inhabitants)
45 Km NW of Latina (125985 inhabitants)
45 Km N of Anzio (54211 inhabitants)
79 Km SW of L'Aquila (69753 inhabitants)
80 Km S of Terni (111501 inhabitants)
82 Km E of Civitavecchia (52991 inhabitants)
82 Km SE of Viterbo (67173 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 2019-03-25
00:09:42
41.85 12.72 11 2019-03-25
00:13:42
Sala Sismica INGV-Roma 66888051
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-03-25 00:09:42 ± 0.16
Latitude 41.85 ± 0.01
Longitude 12.72 ± 0.02
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 66888051

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2037
Semi-minor axis of confidence ellipse (meter) 823
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 282
Circular confidence region, given by single value of horizontal uncertainty (meter) 2040
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 162
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.03687
Epicentral distance of station farthest from the epicenter (degree) 0.21943
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 66888051
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-03-25 00:13:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CERT.HHZ. 2019-03-25T00:09:51.62 0.6 undecidable manual S 62 0.2194 50 -0.17 47
IV.LAV9.HHZ. 2019-03-25T00:09:50.61 0.1 undecidable manual S 186 0.1682 50 0.34 93
IV.MTCE.HHZ. 2019-03-25T00:09:50.57 0.6 undecidable manual S 5 0.1781 50 0 50
IV.VIVA.HHZ. 2019-03-25T00:09:48.52 0.6 undecidable manual S 159 0.1016 134 0.21 48
IV.MTCE.HHZ. 2019-03-25T00:09:47.56 0.3 positive manual P 5 0.1781 50 0.26 70
IV.RDP.HHZ. 2019-03-25T00:09:47.54 0.6 undecidable manual S 186 0.0854 139 -0.34 47
IV.CERT.HHZ. 2019-03-25T00:09:47.90 0.6 negative manual P 62 0.2194 50 -0.1 48
IV.RDP.HHZ. 2019-03-25T00:09:46.12 0.1 negative manual P 186 0.0854 139 0.38 93
IV.LAV9.HHZ. 2019-03-25T00:09:46.36 0.1 undecidable manual P 186 0.1682 50 -0.77 80
IV.VIVA.HHZ. 2019-03-25T00:09:46.21 0.6 negative manual P 159 0.1016 134 0.22 48
IV.RMP.HHZ. 2019-03-25T00:09:46.38 0.6 undecidable manual S 203 0.0369 160 -0.54 45
IV.RMP.HHZ. 2019-03-25T00:09:45.28 0.1 negative manual P 203 0.0369 160 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RDP.HHE. ML:2 0.001275 0.26 AML other m 2019-03-25T00:09:49.53
IV.RDP.HHN. ML:2.1 0.001435 1.26 AML other m 2019-03-25T00:09:49.75
IV.VIVA.HHE. ML:1.8 0.000702 0.68 AML other m 2019-03-25T00:09:50.72
IV.MTCE.HHN. ML:1.5 0.000209 0.46 AML other m 2019-03-25T00:09:51.02
IV.CERT.HHN. ML:1 6.075E-5 0.8 AML other m 2019-03-25T00:09:52.12
IV.MTCE.HHE. ML:1 8.22E-5 1.54 AML other m 2019-03-25T00:09:52.17
IV.CERT.HHE. ML:1.3 0.000117 0.76 AML other m 2019-03-25T00:09:53.54
IV.VIVA.HHN. ML:2 0.001057 0.24 AML other m 2019-03-25T00:09:53.67
IV.LAV9.HHE. ML:1.7 0.0003515 0.42 AML other m 2019-03-25T00:09:55.33
IV.LAV9.HHN. ML:1.7 0.000368 0.5 AML other m 2019-03-25T00:09:56.76
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