Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 23-08-2019 and time 22:24:18 (Italy) in region 4 km W Veroli (FR)

A magnitude ML 0.8 earthquake occured in region: 4 km W Veroli (FR), on

  • 23-08-2019 20:24:18 (UTC)
  • 23-08-2019 22:24:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.6830, 13.3760 at 12 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.

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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
Veroli FR 4 20560 20560
Frosinone FR 5 46323 66883
Alatri FR 6 28952 95835
Torrice FR 6 4816 100651
Fumone FR 9 2102 102753
Collepardo FR 9 968 103721
Ripi FR 9 5270 108991
Boville Ernica FR 9 8737 117728
Ferentino FR 10 21213 138941
Vico nel Lazio FR 11 2234 141175
Arnara FR 11 2309 143484
Monte San Giovanni Campano FR 13 12929 156413
Ceccano FR 13 23565 179978
Strangolagalli FR 13 2491 182469
Trivigliano FR 13 1705 184174
Pofi FR 13 4204 188378
Guarcino FR 14 1623 190001
Castelliri FR 15 3454 193455
Patrica FR 15 3171 196626
Supino FR 15 4873 201499
Torre Cajetani FR 15 1376 202875
Morolo FR 16 3257 206132
Fontana Liri FR 17 2953 209085
Isola del Liri FR 17 11715 220800
Giuliano di Roma FR 18 2400 223200
Fiuggi FR 19 10536 233736
Sgurgola FR 19 2676 236412
Villa Santo Stefano FR 19 1720 238132
Ceprano FR 19 8897 247029
Castro dei Volsci FR 20 4781 251810
Anagni FR 20 21464 273274
Arce FR 20 5756 279030

Municipalities with at least 50000 inhabitants

An earthquake occurred to
46 Km NE of Latina (125985 inhabitants)
50 Km E of Velletri (53303 inhabitants)
57 Km SE of Tivoli (56533 inhabitants)
61 Km E of Aprilia (73446 inhabitants)
64 Km SE of Guidonia Montecelio (88673 inhabitants)
67 Km E of Anzio (54211 inhabitants)
73 Km E of Pomezia (62966 inhabitants)
74 Km S of L'Aquila (69753 inhabitants)
78 Km E of Roma (2864731 inhabitants)
95 Km E of Fiumicino (78395 inhabitants)
99 Km SW of Chieti (51815 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 0.8 2019-08-23
20:24:18		 41.6833 13.3755 12 2019-11-13
14:30:59		 Bollettino Sismico Italiano INGV 71902061
Reviewed
Rev100 		ML 0.8 2019-08-23
20:24:18		 41.6833 13.3755 12 2019-08-24
04:57:07		 Sala Sismica INGV-Roma 71756351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-23 20:24:18 ± 0.05
Latitude 41.6833 ± 0.0045
Longitude 13.3755 ± 0.0036
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 71902061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 402
Semi-minor axis of confidence ellipse (meter) 306
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 353
Circular confidence region, given by single value of horizontal uncertainty (meter) 400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 113
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.36243
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 71756351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-24 04:57:07

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 71902061
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-08-29 08:27:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
AC.VLO.HHZ. 2019-08-23T20:25:57.11 3.0 undecidable manual Sn -5.43 0
CH.MUGIO.HHZ. 2019-08-23T20:25:56.83 3.0 undecidable manual Pg 20.440001 0
IT.LNT.HGZ. 2019-08-23T20:25:54.39 3.0 undecidable manual Sn 2.57 0
IV.ZONE.HHZ. 2019-08-23T20:25:50.75 3.0 undecidable manual Pg 22.030001 0
RF.GEPF.HHZ. 2019-08-23T20:25:45.13 3.0 negative manual Pg 19.18 0
IV.APEC.HHZ. 2019-08-23T20:25:25.65 3.0 undecidable manual Sn 2.27 0
IV.SEI.HHZ. 2019-08-23T20:25:16.72 3.0 negative manual Pg 14.32 0
AC.VLO.HHZ. 2019-08-23T20:25:11.19 3.0 negative manual Pn -2.19 0
IV.SAMA.HHZ. 2019-08-23T20:24:44.71 3.0 undecidable manual Sn -1.68 0
IV.VULT.HHZ. 2019-08-23T20:24:33.49 3.0 undecidable manual Pg 1.16 0
IX.STN3.HHZ.02 2019-08-23T20:24:32.22 3.0 undecidable manual Pn -1.89 0
IV.LATB.EHE. 2019-08-23T20:24:31.73 1.0 undecidable manual S 239 40.2264 92 -0.22 23
IV.VVLD.HHZ. 2019-08-23T20:24:29.02 0.6 undecidable manual S 45 29.1486 94 0.03 49
IV.LATB.EHE. 2019-08-23T20:24:26.27 0.3 undecidable manual P 239 40.2264 92 -0.1 71
IV.LRP.EHZ. 2019-08-23T20:24:25.98 0.3 undecidable manual S 103 17.9709 102 -0.06 75
IV.GIUL.HHZ. 2019-08-23T20:24:25.79 0.3 undecidable manual S 216 17.0718 103 -0.03 75
IV.GUAR.HHE. 2019-08-23T20:24:24.80 0.3 undecidable manual S 337 13.3755 114 -0.08 75
IV.VVLD.HHZ. 2019-08-23T20:24:24.61 0.1 undecidable manual P 45 29.1486 94 -0.06 98
IV.GIUL.HHZ. 2019-08-23T20:24:23.00 0.1 undecidable manual P 216 17.0718 103 0.17 98
IV.GUAR.HHE. 2019-08-23T20:24:22.38 0.1 undecidable manual P 337 13.3755 114 0.09 100
IV.LRP.EHZ. 2019-08-23T20:24:22.97 0.1 undecidable manual P 103 17.9709 102 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LRP.EHE. ML:0.9 0.00005545 0.2 AML other m 2019-08-23T20:24:26.75
IV.LRP.EHN. ML:0.8 0.0000458 0.92 AML other m 2019-08-23T20:24:27.31
IV.VVLD.HHE. ML:0.6 0.0000211 0.56 AML other m 2019-08-23T20:24:30.38
IV.GIUL.HHE. ML:0.8 0.0000511 1.04 AML other m 2019-08-23T20:24:31.11
IV.GIUL.HHN. ML:0.9 0.00006525 0.96 AML other m 2019-08-23T20:24:32.14
IV.VVLD.HHN. ML:0.6 0.00002 1.04 AML other m 2019-08-23T20:24:36.45
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