Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 1.2 on date 24-04-2020 and time 14:53:08 (Italy) in region 2 km N Colonna (RM)

A magnitude Md 1.2 earthquake occured in region: 2 km N Colonna (RM), on

  • 24-04-2020 12:53:08 (UTC)
  • 24-04-2020 14:53:08 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.8560, 12.7440 at 8 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.

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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 2 4287 4287
Monte Porzio Catone RM 5 8693 12980
Monte Compatri RM 5 11978 24958
San Cesareo RM 6 15153 40111
Gallicano nel Lazio RM 7 6334 46445
Rocca Priora RM 7 11962 58407
Zagarolo RM 7 17843 76250
Frascati RM 8 22087 98337
Grottaferrata RM 10 20327 118664
Rocca di Papa RM 11 17034 135698
Marino RM 12 43026 178724
Palestrina RM 12 21672 200396
Castel San Pietro Romano RM 13 902 201298
San Gregorio da Sassola RM 13 1619 202917
Poli RM 13 2418 205335
Tivoli RM 13 56533 261868
Ciampino RM 13 38412 300280
Casape RM 13 744 301024
Labico RM 14 6379 307403
Castel Gandolfo RM 14 8997 316400
Nemi RM 15 1943 318343
Albano Laziale RM 16 41715 360058
Lariano RM 16 13432 373490
Cave RM 16 11287 384777
Guidonia Montecelio RM 16 88673 473450
Ariccia RM 16 19407 492857
Rocca di Cave RM 17 377 493234
Castel Madama RM 17 7399 500633
Valmontone RM 17 15959 516592
Genzano di Roma RM 17 23970 540562
Capranica Prenestina RM 17 351 540913
Pisoniano RM 19 770 541683
Fonte Nuova RM 19 32562 574245
Velletri RM 19 53303 627548
Genazzano RM 19 6036 633584
San Polo dei Cavalieri RM 19 2992 636576
Artena RM 19 14276 650852
Marcellina RM 19 7280 658132
Lanuvio RM 20 13632 671764
Sant'Angelo Romano RM 20 5018 676782

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km SW of Tivoli (56533 inhabitants)
16 Km S of Guidonia Montecelio (88673 inhabitants)
19 Km N of Velletri (53303 inhabitants)
22 Km E of Roma (2864731 inhabitants)
29 Km NE of Pomezia (62966 inhabitants)
30 Km N of Aprilia (73446 inhabitants)
43 Km E of Fiumicino (78395 inhabitants)
45 Km N of Latina (125985 inhabitants)
46 Km N of Anzio (54211 inhabitants)
77 Km SW of L'Aquila (69753 inhabitants)
79 Km S of Terni (111501 inhabitants)
82 Km SE of Viterbo (67173 inhabitants)
83 Km E of Civitavecchia (52991 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		Md 1.2 2020-04-24
12:53:08		 41.8563 12.7445 8 2020-04-24
13:50:42		 Sala Sismica INGV-Roma 78534571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-24 12:53:08 ± 0.15
Latitude 41.8563 ± 0.0036
Longitude 12.7445 ± 0.0060
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 78534571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 520
Semi-minor axis of confidence ellipse (meter) 189
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 303
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 133
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.05306
Epicentral distance of station farthest from the epicenter (degree) 0.19965
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

Md:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 4
Type of magnitude Md
Reference to an origin 78534571
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-24 13:50:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CERT.HHE. 2020-04-24T12:53:16.56 0.3 undecidable manual S 62 22.1556 109 0 74
IV.MTCE.HHN. 2020-04-24T12:53:15.37 0.3 undecidable manual S 359 18.4704 112 0 74
IV.SAMA.EHE. 2020-04-24T12:53:14.02 0.6 undecidable manual S 236 15.1737 117 -0.3 47
IV.RDP.HHE. 2020-04-24T12:53:13.27 0.3 undecidable manual S 195 10.9779 125 0.18 72
IV.CERT.HHE. 2020-04-24T12:53:12.98 0.3 undecidable manual P 62 22.1556 109 -0.14 72
IV.MTCE.HHN. 2020-04-24T12:53:12.56 0.3 undecidable manual P 359 18.4704 112 0.12 72
IV.SAMA.EHE. 2020-04-24T12:53:11.97 0.3 undecidable manual P 236 15.1737 117 0.13 73
IV.RMP.HHE. 2020-04-24T12:53:11.74 0.3 undecidable manual S 214 5.8941 142 -0.05 75
IV.RMP.HHE. 2020-04-24T12:53:10.42 0.1 undecidable manual P 214 5.8941 142 0.05 100
IV.RDP.HHE. 2020-04-24T12:53:10.98 0.6 undecidable manual P 195 10.9779 125 -0.14 49
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download