Earthquake with magnitude of ML 1.2 on date 28-12-2020 and time 20:37:35 (UTC) in region 4 km NE Collelongo (AQ)

A magnitude ML 1.2 earthquake occured in region: 4 km NE Collelongo (AQ), on

  • 28-12-2020 20:37:35 (UTC)
  • 28-12-2020 21:37:35 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.91, 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
Collelongo AQ 4 1233 1233
Villavallelonga AQ 4 919 2152
Ortucchio AQ 6 1860 4012
Lecce nei Marsi AQ 6 1702 5714
Gioia dei Marsi AQ 8 1989 7703
Trasacco AQ 9 6246 13949
Bisegna AQ 11 223 14172
San Benedetto dei Marsi AQ 11 3909 18081
San Vincenzo Valle Roveto AQ 12 2347 20428
Balsorano AQ 13 3569 23997
Civita d'Antino AQ 13 979 24976
Ortona dei Marsi AQ 13 542 25518
Pescina AQ 14 4133 29651
Luco dei Marsi AQ 15 6079 35730
Morino AQ 15 1448 37178
Civitella Roveto AQ 17 3268 40446
Pescasseroli AQ 17 2203 42649
Collarmele AQ 17 894 43543
Anversa degli Abruzzi AQ 18 341 43884
Villalago AQ 18 568 44452
Pescosolido FR 18 1555 46007
Cerchio AQ 18 1635 47642
Canistro AQ 18 995 48637
Cocullo AQ 19 230 48867
Campoli Appennino FR 19 1725 50592
Aielli AQ 20 1475 52067

Municipalities with at least 50000 inhabitants

An earthquake occurred to
53 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)
75 Km E of Guidonia Montecelio (88673 inhabitants)
78 Km NE of Latina (125985 inhabitants)
79 Km SW of Pescara (121014 inhabitants)
80 Km SW of Montesilvano (53738 inhabitants)
84 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 1.2 2020-12-28
20:37:35
41.91 13.63 14 2020-12-28
20:47:22
Sala Sismica INGV-Roma 85809551
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-28 20:37:35 ± 0.08
Latitude 41.91 ± 0.00
Longitude 13.63 ± 0.00
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 85809551

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 408
Semi-minor axis of confidence ellipse (meter) 201
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 83
Circular confidence region, given by single value of horizontal uncertainty (meter) 410
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 117
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.33994
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 85809551
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-28 20:47:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
XK.GIZZ.HHZ. 2020-12-28T20:39:06.51 3.0 undecidable manual Sg 12.23 0
IV.CTI.HHZ. 2020-12-28T20:38:51.73 3.0 undecidable manual Pg 11.5 0
CR.ZAG.BHZ. 2020-12-28T20:38:43.48 3.0 undecidable manual Pn 4.1 0
IV.CELB.HHZ. 2020-12-28T20:38:41.44 3.0 undecidable manual Sn -6.33 0
IV.NDIM.HNZ. 2020-12-28T20:38:41.21 3.0 positive manual Pg 12.92 0
IV.CPGN.EHZ. 2020-12-28T20:38:36.60 3.0 undecidable manual Sn -6.2 0
IV.EPZF.HHZ. 2020-12-28T20:38:23.89 3.0 undecidable manual Pg 1.45 0
IV.MCEL.HHZ. 2020-12-28T20:38:01.58 3.0 undecidable manual Pg 1.53 0
IV.MMUR.HNZ. 2020-12-28T20:38:00.37 3.0 undecidable manual Pn -1.99 0
IV.CSP1.EHZ. 2020-12-28T20:37:57.71 3.0 positive manual Pg 0.42 0
IV.PTRJ.HNZ. 2020-12-28T20:37:55.00 3.0 undecidable manual Sn 0.7 0
IX.MNT3.HHZ.02 2020-12-28T20:37:54.03 3.0 positive manual P 4.58 0
IV.MTMR.HNZ. 2020-12-28T20:37:48.18 3.0 undecidable manual Pg -0.83 0
IV.T0110.HHZ. 2020-12-28T20:37:47.82 0.3 undecidable manual S 19 0.3399 97 0.17 68
IV.LRP.EHE. 2020-12-28T20:37:45.23 0.3 undecidable manual S 187 0.2626 100 -0.16 70
IV.INTR.HHZ. 2020-12-28T20:37:44.34 0.3 undecidable manual S 63 0.2293 103 -0.09 72
IV.POFI.HHE. 2020-12-28T20:37:43.69 0.3 undecidable manual S 162 0.1996 107 0.11 72
IV.PTQR.HHN. 2020-12-28T20:37:43.71 0.6 undecidable manual S 304 0.205 106 -0.01 49
IV.T0110.HHZ. 2020-12-28T20:37:42.34 0.1 undecidable manual P 19 0.3399 97 0.01 94
IV.SACR.HHZ. 2020-12-28T20:37:42.23 3.0 undecidable manual P -1.9 0
IV.LRP.EHE. 2020-12-28T20:37:41.26 0.3 undecidable manual P 187 0.2626 100 0.23 69
IV.INTR.HHZ. 2020-12-28T20:37:40.32 0.1 undecidable manual P 63 0.2293 103 -0.16 94
IV.PTQR.HHN. 2020-12-28T20:37:39.97 0.1 undecidable manual P 304 0.205 106 -0.1 95
IV.POFI.HHE. 2020-12-28T20:37:39.92 0.1 undecidable manual P 162 0.1996 107 -0.06 96
IV.VVLD.HHZ. 2020-12-28T20:37:39.96 0.1 undecidable manual S 187 0.0378 159 0.03 100
IV.VVLD.HHZ. 2020-12-28T20:37:37.96 0.1 undecidable manual P 187 0.0378 159 0.08 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VVLD.HHE. ML:1.3 0.0002245 0.16 AML other m 2020-12-28T20:37:40.04
IV.VVLD.HHN. ML:1.1 0.0001645 0.4 AML other m 2020-12-28T20:37:40.27
IV.VVLD.HNE. ML:1.2 0.0001768747 0.1536 AML other m 2020-12-28T20:37:40.04
IV.VVLD.HNN. ML:1.1 0.000145255745 0.704 AML other m 2020-12-28T20:37:39.64
IV.INTR.HHE. ML:1 6.1015275E-5 0.5248 AML other m 2020-12-28T20:37:44.70
IV.INTR.HHN. ML:1.3 9.79599E-5 0.32 AML other m 2020-12-28T20:37:44.52
IV.INTR.HNE. ML:1.1 6.5937965E-5 0.4096 AML other m 2020-12-28T20:37:44.56
IV.INTR.HNN. ML:1.3 0.000111641375 0.5376 AML other m 2020-12-28T20:37:44.78
IV.T0110.HHE. ML:1 3.6803915E-5 0.4352 AML other m 2020-12-28T20:37:47.99
IV.T0110.HHN. ML:1.5 0.00011668324 0.7168 AML other m 2020-12-28T20:37:48.36
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