Earthquake with magnitude of ML 1.1 on date 23-02-2020 and time 01:34:06 (Italy) in region 3 km NW Ferentino (FR)

A magnitude ML 1.1 earthquake occured in region: 3 km NW Ferentino (FR), on

  • 23-02-2020 00:34:06 (UTC)
  • 23-02-2020 01:34:06 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.72, 13.24 at 10 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
Ferentino FR 3 21213 21213
Fumone FR 5 2102 23315
Anagni FR 7 21464 44779
Trivigliano FR 8 1705 46484
Torre Cajetani FR 9 1376 47860
Sgurgola FR 9 2676 50536
Alatri FR 9 28952 79488
Morolo FR 9 3257 82745
Fiuggi FR 10 10536 93281
Acuto FR 10 1920 95201
Vico nel Lazio FR 11 2234 97435
Guarcino FR 12 1623 99058
Supino FR 12 4873 103931
Collepardo FR 12 968 104899
Gorga RM 12 710 105609
Frosinone FR 13 46323 151932
Patrica FR 14 3171 155103
Piglio FR 15 4666 159769
Gavignano RM 15 1916 161685
Veroli FR 16 20560 182245
Trevi nel Lazio FR 16 1822 184067
Torrice FR 17 4816 188883
Carpineto Romano RM 17 4524 193407
Paliano FR 18 8281 201688
Montelanico RM 18 2131 203819
Segni RM 18 9159 212978
Serrone FR 18 3099 216077
Ceccano FR 18 23565 239642
Colleferro RM 19 21595 261237
Arnara FR 19 2309 263546
Ripi FR 20 5270 268816
Giuliano di Roma FR 20 2400 271216
Jenne RM 20 366 271582

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km E of Velletri (53303 inhabitants)
39 Km NE of Latina (125985 inhabitants)
46 Km SE of Tivoli (56533 inhabitants)
51 Km E of Aprilia (73446 inhabitants)
53 Km SE of Guidonia Montecelio (88673 inhabitants)
59 Km NE of Anzio (54211 inhabitants)
61 Km E of Pomezia (62966 inhabitants)
65 Km E of Roma (2864731 inhabitants)
72 Km S of L'Aquila (69753 inhabitants)
83 Km E of Fiumicino (78395 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 1.1 2020-02-23
00:34:06
41.72 13.24 10 2020-02-23
00:40:19
Sala Sismica INGV-Roma 76737161
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-23 00:34:06 ± 0.08
Latitude 41.72 ± 0.00
Longitude 13.24 ± 0.01
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 76737161

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 467
Semi-minor axis of confidence ellipse (meter) 466
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 216
Circular confidence region, given by single value of horizontal uncertainty (meter) 470
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 126
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.09713
Epicentral distance of station farthest from the epicenter (degree) 0.35523
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 76737161
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-23 00:40:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.POFI.HHZ. 2020-02-23T00:34:19.97 3.0 undecidable manual S 90 0.3552 50 0.59 0
IV.VVLD.HHZ. 2020-02-23T00:34:18.75 0.6 undecidable manual S 62 0.3274 50 0.21 47
IV.PTQR.HHN. 2020-02-23T00:34:18.79 0.6 undecidable manual S 22 0.3301 50 0.18 48
IV.CERT.HHZ. 2020-02-23T00:34:17.41 0.6 undecidable manual S 321 0.3004 50 -0.32 46
IV.RCAV.EHE. 2020-02-23T00:34:16.45 1.0 undecidable manual S 301 0.2527 50 0.11 24
IV.LRP.EHE. 2020-02-23T00:34:16.87 0.6 undecidable manual S 105 0.2707 50 0 50
IV.VVLD.HHZ. 2020-02-23T00:34:13.05 0.6 undecidable manual P 62 0.3274 50 -0.27 47
IV.PTQR.HHN. 2020-02-23T00:34:13.55 0.1 undecidable manual P 22 0.3301 50 0.19 95
IV.GIUL.HHZ. 2020-02-23T00:34:13.49 0.6 undecidable manual S 175 0.1583 120 0.27 48
IV.POFI.HHZ. 2020-02-23T00:34:13.77 0.6 undecidable manual P 90 0.3552 50 -0.03 49
IV.RCAV.EHE. 2020-02-23T00:34:12.52 0.6 undecidable manual P 301 0.2527 50 0.47 45
IV.CERT.HHZ. 2020-02-23T00:34:12.53 0.6 undecidable manual P 321 0.3004 50 -0.32 46
IV.LRP.EHE. 2020-02-23T00:34:12.19 0.1 undecidable manual P 105 0.2707 50 -0.17 97
IV.GUAR.HHZ. 2020-02-23T00:34:11.26 0.6 undecidable manual S 36 0.0971 133 -0.08 51
IV.GIUL.HHZ. 2020-02-23T00:34:10.15 0.1 undecidable manual P 175 0.1583 120 -0.1 100
IV.GUAR.HHZ. 2020-02-23T00:34:09.19 0.6 undecidable manual P 36 0.0971 133 0.03 51
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GUAR.HHN. ML:1.4 0.0002985 0.32 AML other m 2020-02-23T00:34:12.92
IV.GUAR.HHE. ML:1.3 0.000248 0.3 AML other m 2020-02-23T00:34:13.70
IV.VVLD.HHN. ML:0.9 2.96E-5 0.52 AML other m 2020-02-23T00:34:18.52
IV.VVLD.HHE. ML:0.8 2.515E-5 0.34 AML other m 2020-02-23T00:34:21.15
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