Earthquake with magnitude of ML 1.7 on date 22-01-2021 and time 17:43:32 (Italy) in region 4 km N Villavallelonga (AQ)

A magnitude ML 1.7 earthquake occured in region: 4 km N Villavallelonga (AQ), on

  • 22-01-2021 16:43:32 (UTC)
  • 22-01-2021 17:43:32 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.9, 13.63 at 14 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
Villavallelonga AQ 4 919 919
Collelongo AQ 4 1233 2152
Lecce nei Marsi AQ 6 1702 3854
Ortucchio AQ 6 1860 5714
Gioia dei Marsi AQ 8 1989 7703
Trasacco AQ 10 6246 13949
Bisegna AQ 11 223 14172
San Vincenzo Valle Roveto AQ 12 2347 16519
San Benedetto dei Marsi AQ 12 3909 20428
Balsorano AQ 12 3569 23997
Civita d'Antino AQ 13 979 24976
Ortona dei Marsi AQ 14 542 25518
Pescina AQ 14 4133 29651
Morino AQ 15 1448 31099
Luco dei Marsi AQ 15 6079 37178
Pescasseroli AQ 17 2203 39381
Pescosolido FR 17 1555 40936
Civitella Roveto AQ 17 3268 44204
Villalago AQ 17 568 44772
Anversa degli Abruzzi AQ 18 341 45113
Collarmele AQ 18 894 46007
Cerchio AQ 18 1635 47642
Campoli Appennino FR 19 1725 49367
Canistro AQ 19 995 50362
Cocullo AQ 19 230 50592

Municipalities with at least 50000 inhabitants

An earthquake occurred to
54 Km SE of L'Aquila (69753 inhabitants)
67 Km SW of Chieti (51815 inhabitants)
69 Km E of Tivoli (56533 inhabitants)
75 Km E of Velletri (53303 inhabitants)
76 Km E of Guidonia Montecelio (88673 inhabitants)
77 Km NE of Latina (125985 inhabitants)
79 Km SW of Pescara (121014 inhabitants)
81 Km SW of Montesilvano (53738 inhabitants)
85 Km S of Teramo (54892 inhabitants)
88 Km E of Aprilia (73446 inhabitants)
95 Km E of Roma (2864731 inhabitants)
97 Km E of Pomezia (62966 inhabitants)
97 Km NE of Anzio (54211 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
Reviewed
Rev100
ML 1.7 2021-01-22
16:43:32
41.9 13.63 14 2021-01-22
16:53:56
Sala Sismica INGV-Roma 86462681
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-22 16:43:32 ± 0.07
Latitude 41.90 ± 0.00
Longitude 13.63 ± 0.01
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86462681

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 517
Semi-minor axis of confidence ellipse (meter) 118
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 301
Circular confidence region, given by single value of horizontal uncertainty (meter) 520
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 59
Number of associated phases, regardless of their use for origin computation 44
Number of defining phases 27
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) 0.5297
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 86462681
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-22 16:53:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MPNC.HHZ. 2021-01-22T16:45:16.79 3.0 undecidable manual Sg 5.03 0
IV.MNTV.HNZ. 2021-01-22T16:45:09.34 3.0 undecidable manual Sn -3.35 0
IV.GIZZ.HHZ. 2021-01-22T16:45:08.21 3.0 undecidable manual Sg 7.64 0
IV.RESU.HHZ. 2021-01-22T16:45:03.57 3.0 undecidable manual Sn -9.99 0
IV.CRJA.HHZ. 2021-01-22T16:44:59.11 3.0 undecidable manual Sn -9.99 0
IV.NDIM.HHZ. 2021-01-22T16:44:29.91 3.0 negative manual Pg 5.91 0
IV.GIB.HHZ. 2021-01-22T16:44:16.26 3.0 positive manual Pn -9.99 0
IV.SPS2.HHZ. 2021-01-22T16:44:14.08 3.0 positive manual Pn -4.02 0
IV.ORI.HHZ. 2021-01-22T16:44:11.04 3.0 undecidable manual Pg -0.25 0
IV.FRON.EHZ. 2021-01-22T16:44:01.24 3.0 undecidable manual Pg 2.53 0
OT.OT14.EHZ. 2021-01-22T16:43:59.31 3.0 positive manual Pg 2.9 0
IV.SGRT.HHZ. 2021-01-22T16:43:54.94 3.0 positive manual Pg 0.18 0
IV.MNTP.HNZ. 2021-01-22T16:43:54.51 3.0 positive manual Pg 2.82 0
IV.RCAV.EHZ. 2021-01-22T16:43:52.43 3.0 undecidable manual Sg 2.17 0
IV.MRB1.HHZ. 2021-01-22T16:43:49.83 3.0 negative manual Pg -0.17 0
IV.GIUL.HHZ. 2021-01-22T16:43:48.08 0.6 undecidable manual S 220 0.4443 95 0.19 45
IV.LPEL.HHZ. 2021-01-22T16:43:47.28 0.6 undecidable manual S 70 0.4344 95 -0.31 44
IV.CERA.HHE. 2021-01-22T16:43:47.55 0.6 undecidable manual S 136 0.4182 96 0.43 42
IV.T0110.HHZ. 2021-01-22T16:43:44.72 0.6 undecidable manual S 18 0.3444 98 -0.25 45
IV.FIAM.HHN. 2021-01-22T16:43:43.57 0.3 undecidable manual P 314 0.5297 94 0.84 55
IT.SULA.HNZ. 2021-01-22T16:43:43.00 0.6 undecidable manual S 51 0.2725 101 0.16 47
IT.SULP.HGE. 2021-01-22T16:43:43.20 0.6 undecidable manual S 50 0.286 100 -0.03 48
IV.LRP.EHZ. 2021-01-22T16:43:42.38 0.6 undecidable manual S 188 0.2563 102 0 48
IV.GUAR.HHE. 2021-01-22T16:43:42.30 0.6 undecidable manual S 246 0.2617 102 -0.23 46
IV.PTRJ.HNZ. 2021-01-22T16:43:42.60 3.0 undecidable manual Pg -1.81 0
IV.RNI2.HNN. 2021-01-22T16:43:41.38 0.3 undecidable manual P 117 0.4344 95 0.26 66
IV.VIVA.HHZ. 2021-01-22T16:43:41.22 3.0 undecidable manual Pg -1.87 0
IV.INTR.HHZ. 2021-01-22T16:43:41.60 0.6 undecidable manual S 61 0.2302 104 -0.02 49
IV.CERA.HHE. 2021-01-22T16:43:40.48 0.3 undecidable manual P 136 0.4182 96 -0.35 66
IV.GIUL.HHZ. 2021-01-22T16:43:40.91 0.3 undecidable manual P 220 0.4443 95 -0.36 65
IV.PTQR.HHZ. 2021-01-22T16:43:40.91 0.3 undecidable manual S 305 0.2104 107 -0.16 70
IV.LPEL.HHZ. 2021-01-22T16:43:40.69 0.3 undecidable manual P 70 0.4344 95 -0.41 65
IV.POFI.HNE. 2021-01-22T16:43:40.42 0.6 undecidable manual S 162 0.1934 109 -0.15 48
IV.FAGN.HHZ. 2021-01-22T16:43:39.85 0.6 undecidable manual P 354 0.366 97 -0.09 46
IT.SULP.HGE. 2021-01-22T16:43:39.05 0.3 undecidable manual P 50 0.286 100 0.47 66
IV.T0110.HHZ. 2021-01-22T16:43:39.34 0.3 undecidable manual P 18 0.3444 98 -0.25 68
IV.LRP.EHZ. 2021-01-22T16:43:38.06 0.3 undecidable manual P 188 0.2563 102 -0.04 72
IV.GUAR.HHE. 2021-01-22T16:43:38.75 0.3 undecidable manual P 246 0.2617 102 0.57 65
IT.SULA.HNZ. 2021-01-22T16:43:38.83 0.6 undecidable manual P 51 0.2725 101 0.47 44
IV.PTQR.HHZ. 2021-01-22T16:43:37.09 0.1 undecidable manual P 305 0.2104 107 -0.24 92
IV.INTR.HHZ. 2021-01-22T16:43:37.49 0.1 negative manual P 61 0.2302 104 -0.17 95
IV.POFI.HNE. 2021-01-22T16:43:37.01 0.1 undecidable manual P 162 0.1934 109 -0.04 98
IV.VVLD.HHZ. 2021-01-22T16:43:37.08 0.3 undecidable manual S 193 0.0324 163 -0.04 76
IV.VVLD.HHZ. 2021-01-22T16:43:35.12 0.1 undecidable manual P 193 0.0324 163 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VVLD.HHE. ML:1.8 0.0007225 0.16 AML other m 2021-01-22T16:43:37.29
IV.VVLD.HNE. ML:1.7 0.000654 0.16 AML other m 2021-01-22T16:43:37.29
IV.VVLD.HHN. ML:1.7 0.0006145 0.4 AML other m 2021-01-22T16:43:37.24
IV.VVLD.HNN. ML:1.7 0.0005595 0.38 AML other m 2021-01-22T16:43:37.25
IV.INTR.HHN. ML:1.9 0.0003988235 0.1408 AML other m 2021-01-22T16:43:41.84
IV.INTR.HHE. ML:1.8 0.000322775 0.1408 AML other m 2021-01-22T16:43:42.16
IV.PTQR.HHN. ML:1.2 9.24E-5 0.46 AML other m 2021-01-22T16:43:42.58
IV.PTQR.HHE. ML:1.2 9.6995135E-5 0.1792 AML other m 2021-01-22T16:43:41.08
IV.LRP.EHE. ML:1.9 0.0003435 0.4 AML other m 2021-01-22T16:43:43.26
IV.LRP.EHN. ML:0.9 3.738867E-5 0.2944 AML other m 2021-01-22T16:43:42.84
IV.LPEL.HHE. ML:1.6 0.000118 0.12 AML other m 2021-01-22T16:43:48.81
IV.LPEL.HHN. ML:1.6 0.000100860005 0.1408 AML other m 2021-01-22T16:43:48.81
IV.FAGN.HHE. ML:1.8 0.0002165 0.5 AML other m 2021-01-22T16:43:49.66
IV.FAGN.HHN. ML:1.7 0.000162 0.36 AML other m 2021-01-22T16:43:51.35
IV.INTR.HNE. ML:1.8 0.00030409405 0.3584 AML other m 2021-01-22T16:43:42.57
IV.INTR.HNN. ML:1.9 0.00038372565 0.128 AML other m 2021-01-22T16:43:41.84
IV.T0110.HHE. ML:1.5 0.00012038915 0.1792 AML other m 2021-01-22T16:43:46.03
IV.T0110.HHN. ML:1.6 0.00012491315 0.384 AML other m 2021-01-22T16:43:47.64
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