Earthquake with magnitude of ML 0.9 on date 23-02-2020 and time 18:52:17 (UTC) in region 2 km S Collepardo (FR)

A magnitude ML 0.9 earthquake occured in region: 2 km S Collepardo (FR), on

  • 23-02-2020 18:52:17 (UTC)
  • 23-02-2020 19:52:17 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.74, 13.37 at 9 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
Collepardo FR 2 968 968
Alatri FR 3 28952 29920
Vico nel Lazio FR 5 2234 32154
Veroli FR 7 20560 52714
Fumone FR 7 2102 54816
Guarcino FR 8 1623 56439
Trivigliano FR 9 1705 58144
Torre Cajetani FR 11 1376 59520
Ferentino FR 11 21213 80733
Frosinone FR 11 46323 127056
Torrice FR 13 4816 131872
Boville Ernica FR 14 8737 140609
Fiuggi FR 14 10536 151145
Ripi FR 15 5270 156415
Morino AQ 16 1448 157863
Castelliri FR 16 3454 161317
San Vincenzo Valle Roveto AQ 16 2347 163664
Monte San Giovanni Campano FR 16 12929 176593
Trevi nel Lazio FR 17 1822 178415
Filettino FR 17 565 178980
Acuto FR 17 1920 180900
Arnara FR 17 2309 183209
Balsorano AQ 17 3569 186778
Anagni FR 18 21464 208242
Isola del Liri FR 18 11715 219957
Civita d'Antino AQ 18 979 220936
Morolo FR 18 3257 224193
Strangolagalli FR 18 2491 226684
Supino FR 19 4873 231557
Ceccano FR 19 23565 255122
Patrica FR 20 3171 258293
Pofi FR 20 4204 262497
Sgurgola FR 20 2676 265173

Municipalities with at least 50000 inhabitants

An earthquake occurred to
49 Km NE of Latina (125985 inhabitants)
50 Km E of Velletri (53303 inhabitants)
54 Km E of Tivoli (56533 inhabitants)
61 Km E of Guidonia Montecelio (88673 inhabitants)
62 Km E of Aprilia (73446 inhabitants)
68 Km S of L'Aquila (69753 inhabitants)
70 Km E of Anzio (54211 inhabitants)
73 Km E of Pomezia (62966 inhabitants)
76 Km E of Roma (2864731 inhabitants)
94 Km E of Fiumicino (78395 inhabitants)
95 Km SW of Chieti (51815 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 0.9 2020-02-23
18:52:17
41.74 13.37 9 2020-02-23
20:06:33
Sala Sismica INGV-Roma 76761041
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-23 18:52:17 ± 0.1
Latitude 41.74 ± 0.01
Longitude 13.37 ± 0.01
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 76761041

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 552
Semi-minor axis of confidence ellipse (meter) 532
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 164
Circular confidence region, given by single value of horizontal uncertainty (meter) 550
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 100
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.48024
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 76761041
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-23 20:06:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.GORR.HHZ. 2020-02-23T18:54:00.04 3.0 undecidable manual Sn -2.84 0
AC.VLO.HHZ. 2020-02-23T18:53:42.82 3.0 undecidable manual Pg 16 0
ST.CARE.EHZ. 2020-02-23T18:53:41.36 3.0 undecidable manual Pg 12.88 0
IV.CET2.HHZ. 2020-02-23T18:53:39.17 3.0 undecidable manual Sn 1.09 0
GU.RRL.HHZ. 2020-02-23T18:53:38.37 3.0 undecidable manual Pn 0.12 0
IV.SERM.HNZ. 2020-02-23T18:53:19.67 3.0 negative manual Pg 11.27 0
XK.GIZZ.HHZ. 2020-02-23T18:53:19.82 3.0 positive manual Pg 10.31 0
IV.ARVD.HHZ. 2020-02-23T18:52:45.12 3.0 undecidable manual Pg 1.62 0
IV.MTRA.EHZ. 2020-02-23T18:52:32.00 3.0 undecidable manual P -1.01 0
IV.CERT.HHZ. 2020-02-23T18:52:31.57 0.6 undecidable manual S 306 0.3579 50 0.85 39
IV.PTQR.HHZ. 2020-02-23T18:52:28.40 0.6 undecidable manual S 4 0.2824 50 -0.09 50
IV.T0110.. 2020-02-23T18:52:28.88 3.0 undecidable manual S 0
IV.POFI.HHE. 2020-02-23T18:52:27.92 0.6 undecidable manual S 95 0.2545 108 0.38 47
IV.VVLD.HHZ. 2020-02-23T18:52:26.78 0.3 undecidable manual S 55 0.2275 110 0.23 73
IV.INTR.HHE. 2020-02-23T18:52:26.86 0.1 undecidable manual P 55 0.4802 50 -0.26 92
IV.GIUL.HHZ. 2020-02-23T18:52:25.49 0.6 undecidable manual S 206 0.2023 112 -0.16 50
IV.LRP.EHZ. 2020-02-23T18:52:25.19 0.6 undecidable manual S 120 0.1853 114 0.14 50
IV.CERT.HHZ. 2020-02-23T18:52:24.74 0.1 undecidable manual P 306 0.3579 50 -0.28 94
IV.PTQR.HHZ. 2020-02-23T18:52:23.83 0.1 undecidable manual P 4 0.2824 50 0.1 99
IV.VVLD.HHZ. 2020-02-23T18:52:22.50 0.1 undecidable manual P 55 0.2275 110 -0.12 100
IV.GIUL.HHZ. 2020-02-23T18:52:22.41 0.6 positive manual P 206 0.2023 112 0.31 48
IV.POFI.HHE. 2020-02-23T18:52:22.91 0.1 undecidable manual P 95 0.2545 108 -0.28 96
IV.LRP.EHZ. 2020-02-23T18:52:21.84 0.6 negative manual P 120 0.1853 114 0.09 51
IV.GUAR.HHZ. 2020-02-23T18:52:21.12 0.6 undecidable manual S 320 0.0701 140 -0.29 50
IV.GUAR.HHZ. 2020-02-23T18:52:19.82 0.3 positive manual P 320 0.0701 140 0.18 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GUAR.HHN. ML:1.6 0.000695 0.76 AML other m 2020-02-23T18:52:22.15
IV.GUAR.HHE. ML:1.5 0.0005175 1.04 AML other m 2020-02-23T18:52:22.26
IV.LRP.EHN. ML:0.7 3.575E-5 1.58 AML other m 2020-02-23T18:52:27.82
IV.LRP.EHE. ML:1.2 0.000118 0.36 AML other m 2020-02-23T18:52:28.40
IV.GIUL.HHE. ML:0.8 4.59E-5 0.52 AML other m 2020-02-23T18:52:28.45
IV.GIUL.HHN. ML:0.9 4.93E-5 1.58 AML other m 2020-02-23T18:52:30.88
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