Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 26-08-2019 and time 01:06:19 (Italy) in region 4 km NE Colonna (RM)

A magnitude ML 1.5 earthquake occured in region: 4 km NE Colonna (RM), on

  • 25-08-2019 23:06:19 (UTC)
  • 26-08-2019 01:06:19 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.8600, 12.7780 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 4 6334 10621
San Cesareo RM 5 15153 25774
Zagarolo RM 5 17843 43617
Monte Compatri RM 7 11978 55595
Monte Porzio Catone RM 7 8693 64288
Rocca Priora RM 7 11962 76250
Palestrina RM 10 21672 97922
Castel San Pietro Romano RM 10 902 98824
Frascati RM 10 22087 120911
Poli RM 10 2418 123329
San Gregorio da Sassola RM 10 1619 124948
Casape RM 10 744 125692
Tivoli RM 12 56533 182225
Grottaferrata RM 12 20327 202552
Rocca di Papa RM 12 17034 219586
Labico RM 12 6379 225965
Cave RM 14 11287 237252
Rocca di Cave RM 14 377 237629
Marino RM 14 43026 280655
Capranica Prenestina RM 15 351 281006
Valmontone RM 15 15959 296965
Castel Madama RM 15 7399 304364
Lariano RM 15 13432 317796
Ciampino RM 16 38412 356208
Pisoniano RM 16 770 356978
Guidonia Montecelio RM 16 88673 445651
Nemi RM 16 1943 447594
Castel Gandolfo RM 16 8997 456591
Genazzano RM 16 6036 462627
San Vito Romano RM 17 3273 465900
Albano Laziale RM 18 41715 507615
Artena RM 18 14276 521891
Ciciliano RM 18 1336 523227
Ariccia RM 18 19407 542634
San Polo dei Cavalieri RM 18 2992 545626
Genzano di Roma RM 18 23970 569596
Marcellina RM 18 7280 576876
Velletri RM 19 53303 630179
Sambuci RM 19 925 631104
Cerreto Laziale RM 19 1118 632222
Vicovaro RM 20 4019 636241
Gerano RM 20 1263 637504

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km S of Tivoli (56533 inhabitants)
16 Km S of Guidonia Montecelio (88673 inhabitants)
19 Km N of Velletri (53303 inhabitants)
25 Km E of Roma (2864731 inhabitants)
31 Km NE of Pomezia (62966 inhabitants)
31 Km NE of Aprilia (73446 inhabitants)
45 Km N of Latina (125985 inhabitants)
46 Km E of Fiumicino (78395 inhabitants)
47 Km N of Anzio (54211 inhabitants)
75 Km SW of L'Aquila (69753 inhabitants)
79 Km S of Terni (111501 inhabitants)
83 Km SE of Viterbo (67173 inhabitants)
85 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
Bulletin
Rev1000 		ML 1.5 2019-08-25
23:06:19		 41.8603 12.7785 10 2019-11-13
14:31:00		 Bollettino Sismico Italiano INGV 71911341
Reviewed
Rev100 		ML 1.7 2019-08-25
23:06:20		 41.867 12.7218 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 23:06:19 ± 0.08
Latitude 41.8603 ± 0.0045
Longitude 12.7785 ± 0.0060
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 71911341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 575
Semi-minor axis of confidence ellipse (meter) 373
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 222
Circular confidence region, given by single value of horizontal uncertainty (meter) 580.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 67
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.66460
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 71911341
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-08-29 14:10:25

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(km) Takeoff_angle Residual Weight
GU.GRAM.HHZ. 2019-08-25T23:06:47.69 3.0 undecidable manual Pn 0.19 0
IV.BARO.HNZ. 2019-08-25T23:06:42.38 0.3 undecidable manual S 306 73.7706 50 0.32 64
IV.OFFI.HHZ. 2019-08-25T23:06:41.72 3.0 undecidable manual S -0.43 0
IV.TOLF.HHN. 2019-08-25T23:06:40.76 0.3 undecidable manual S 290 68.0763 50 0.21 67
IV.GIUL.HHZ. 2019-08-25T23:06:36.42 0.3 undecidable manual S 130 51.7038 50 0.23 68
IV.FIAM.HHZ. 2019-08-25T23:06:36.83 0.6 undecidable manual S 32 53.1024 50 0.27 45
IV.GUAR.HNN. 2019-08-25T23:06:34.32 1.0 undecidable manual S 99 44.7219 50 0 24
IT.MMP1.HGE. 2019-08-25T23:06:34.02 0.3 undecidable manual S 357 43.2234 50 0.11 71
IV.LATB.EHE. 2019-08-25T23:06:33.72 0.6 undecidable manual S 159 43.4232 50 -0.25 46
IV.BARO.HNZ. 2019-08-25T23:06:32.68 0.3 undecidable manual P 306 73.7706 50 0.12 67
IV.TOLF.HHN. 2019-08-25T23:06:31.57 0.3 undecidable manual P 290 68.0763 50 -0.12 68
IV.FIAM.HHZ. 2019-08-25T23:06:29.20 0.1 undecidable manual P 32 53.1024 50 -0.18 92
IV.GUAR.HNN. 2019-08-25T23:06:28.10 1.0 undecidable manual P 99 44.7219 50 0.01 24
IV.LAV9.HNZ. 2019-08-25T23:06:28.00 0.6 undecidable manual S 198 21.2676 114 0.32 47
IV.GIUL.HHZ. 2019-08-25T23:06:28.83 0.3 undecidable manual P 130 51.7038 50 -0.34 67
IT.MMP1.HGE. 2019-08-25T23:06:27.51 0.3 undecidable manual P 357 43.2234 50 -0.35 68
IV.LATB.EHE. 2019-08-25T23:06:27.76 0.1 undecidable manual P 159 43.4232 50 -0.13 95
IV.SAMA.HHZ. 2019-08-25T23:06:26.15 0.3 undecidable manual S 240 17.7711 118 -0.42 70
IV.OFFI.HHZ. 2019-08-25T23:06:26.59 3.0 undecidable manual P 0.64 0
IV.VIVA.HHZ. 2019-08-25T23:06:25.31 0.3 undecidable manual S 183 12.2766 128 0.35 72
IV.LAV9.HNZ. 2019-08-25T23:06:24.16 0.6 undecidable manual P 198 21.2676 114 -0.1 50
IV.RMP.HHZ. 2019-08-25T23:06:23.82 0.3 undecidable manual S 229 8.3805 139 -0.15 75
IV.SAMA.HHZ. 2019-08-25T23:06:23.48 0.1 undecidable manual P 240 17.7711 118 -0.14 99
IV.RMP.HHZ. 2019-08-25T23:06:22.27 0.1 positive manual P 229 8.3805 139 0.16 100
IV.VIVA.HHZ. 2019-08-25T23:06:22.93 0.1 undecidable manual P 183 12.2766 128 0.24 98
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 0.0006158600000000001 0.128 AML other m 2019-08-25T23:06:24.20
IV.RMP.HHN. ML:1.7 0.0008338221500000001 0.1792 AML other m 2019-08-25T23:06:24.13
IV.SAMA.HHE. ML:1.2 0.00012491175 0.1024 AML other m 2019-08-25T23:06:28.22
IV.SAMA.HHN. ML:1.0 0.000077923275 0.1664 AML other m 2019-08-25T23:06:29.20
IV.VIVA.HHN. ML:1.6 0.0004959339 0.3712 AML other m 2019-08-25T23:06:31.33
IV.LAV9.HHN. ML:1.6 0.0003008099 0.2816 AML other m 2019-08-25T23:06:31.58
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 0.00036164450000000006 0.3584 AML other m 2019-08-25T23:06:33.64
IV.LAV9.HNE. ML:1.8 0.00039467610000000003 0.3584 AML other m 2019-08-25T23:06:33.66
IV.VIVA.HHE. ML:1.5 0.0003791806 0.3456 AML other m 2019-08-25T23:06:30.53
IV.FIAM.HHN. ML:0.6 0.000007571273 0.3328 AML other m 2019-08-25T23:06:44.09
IV.FIAM.HHE. ML:0.6 0.000009358225000000001 0.4224 AML other m 2019-08-25T23:06:41.85
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