Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 20-01-2021 and time 00:46:16 (Italy) in region 9 km NE L'Aquila (AQ)

A magnitude ML 1.3 earthquake occured in region: 9 km NE L'Aquila (AQ), on

  • 19-01-2021 23:46:16 (UTC)
  • 20-01-2021 00:46:16 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.4070, 13.4760 at 20 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
L'Aquila AQ 9 69753 69753
Poggio Picenze AQ 11 1136 70889
Fossa AQ 13 721 71610
Barisciano AQ 13 1828 73438
Ocre AQ 14 1167 74605
Sant'Eusanio Forconese AQ 14 394 74999
Pietracamela TE 15 271 75270
San Demetrio ne' Vestini AQ 15 1854 77124
Pizzoli AQ 15 4326 81450
Crognaleto TE 16 1297 82747
Santo Stefano di Sessanio AQ 16 111 82858
Villa Sant'Angelo AQ 16 424 83282
Barete AQ 17 737 84019
Fano Adriano TE 17 296 84315
Lucoli AQ 17 1011 85326
Prata d'Ansidonia AQ 18 496 85822
Scoppito AQ 18 3727 89549
Isola del Gran Sasso d'Italia TE 19 4773 94322
Fagnano Alto AQ 19 418 94740
Campotosto AQ 19 542 95282
Rocca di Cambio AQ 19 533 95815
Capitignano AQ 19 665 96480
Tornimparte AQ 19 3187 99667
San Pio delle Camere AQ 20 661 100328

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km NE of L'Aquila (69753 inhabitants)
34 Km SW of Teramo (54892 inhabitants)
57 Km W of Montesilvano (53738 inhabitants)
57 Km W of Chieti (51815 inhabitants)
61 Km W of Pescara (121014 inhabitants)
70 Km E of Terni (111501 inhabitants)
74 Km NE of Tivoli (56533 inhabitants)
77 Km NE of Guidonia Montecelio (88673 inhabitants)
88 Km SE of Foligno (57155 inhabitants)
99 Km NE of Velletri (53303 inhabitants)
100 Km NE of Roma (2864731 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 1.3 2021-01-19
23:46:16		 42.4073 13.4763 20 2021-07-12
16:55:13		 Bollettino Sismico Italiano INGV 90673601
Reviewed
Rev100 		ML 1.3 2021-01-19
23:46:16		 42.4097 13.4727 20 2021-01-19
23:55:41		 Sala Sismica INGV-Roma 86386661
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-19 23:46:16 ± 0.06
Latitude 42.4073 ± 0.0027
Longitude 13.4763 ± 0.0037
Depth (km) 20 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 90673601

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 380
Semi-minor axis of confidence ellipse (meter) 0
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 233
Circular confidence region, given by single value of horizontal uncertainty (meter) 380.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 56
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.54859
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 90673601
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-01 01:26:22

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 86386661
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-19 23:55:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CPGN.EHZ. 2021-01-19T23:47:02.47 3.0 undecidable manual Sn 0 0
IV.ATFO.HHZ. 2021-01-19T23:46:38.70 3.0 undecidable manual P 3.33 0
IV.INTR.HHZ. 2021-01-19T23:46:33.60 0.6 undecidable manual S 141 56.2992 101 -0.22 45
IV.NRCA.HHZ. 2021-01-19T23:46:33.92 0.6 undecidable manual S 328 55.7997 101 0.23 44
IV.LNSS.HNZ. 2021-01-19T23:46:30.18 0.6 undecidable manual S 301 41.7249 106 0.14 46
IV.PTQR.HHZ. 2021-01-19T23:46:30.59 0.6 undecidable manual S 188 43.2234 105 0.17 46
IV.FIAM.HNN. 2021-01-19T23:46:28.16 0.6 undecidable manual S 242 33.2445 111 0.26 46
IV.T0110.HHZ. 2021-01-19T23:46:27.53 0.3 undecidable manual S 129 31.5462 113 0.06 72
IV.VCEL.EHZ. 2021-01-19T23:46:27.78 0.6 undecidable manual S 93 29.8479 114 0.72 40
IV.T1299.HNN. 2021-01-19T23:46:27.12 0.6 undecidable manual S 328 29.748 114 0.08 48
IV.NRCA.HHZ. 2021-01-19T23:46:26.14 0.3 undecidable manual P 328 55.7997 101 -0.12 68
IV.TERO.HHZ. 2021-01-19T23:46:26.05 0.3 undecidable manual S 24 26.0517 118 -0.11 72
IV.VVLD.HHZ. 2021-01-19T23:46:26.99 0.3 undecidable manual P 168 60.8946 100 -0.04 69
IV.SMA1.EHZ. 2021-01-19T23:46:26.45 0.6 undecidable manual S 335 27.3504 117 0.01 49
IV.RM33.EHZ. 2021-01-19T23:46:25.66 0.3 undecidable manual S 298 24.2535 120 -0.06 72
IV.INTR.HHZ. 2021-01-19T23:46:25.90 0.1 undecidable manual P 141 56.2992 101 -0.44 85
IV.FAGN.HHZ. 2021-01-19T23:46:24.55 0.3 undecidable manual S 151 17.9709 130 0.18 72
IV.LNSS.HNZ. 2021-01-19T23:46:24.08 0.3 undecidable manual P 301 41.7249 106 -0.08 70
IV.PTQR.HHZ. 2021-01-19T23:46:24.31 0.6 undecidable manual P 188 43.2234 105 -0.07 47
IV.CAMP.HHZ. 2021-01-19T23:46:23.84 0.6 undecidable manual S 339 15.2736 136 0.01 50
IV.SMA1.EHZ. 2021-01-19T23:46:22.06 0.1 undecidable manual P 335 27.3504 117 -0.02 97
IV.T1299.HNN. 2021-01-19T23:46:22.49 0.1 undecidable manual P 328 29.748 114 0.07 96
IV.GIGS.HHN. 2021-01-19T23:46:22.57 0.3 undecidable manual S 57 9.3795 150 -0.31 70
IV.T0110.HHZ. 2021-01-19T23:46:22.66 0.1 undecidable manual P 129 31.5462 113 -0.02 97
IV.FIAM.HNN. 2021-01-19T23:46:22.81 0.3 undecidable manual P 242 33.2445 111 -0.11 71
MN.AQU.HNE. 2021-01-19T23:46:22.69 0.6 undecidable manual S 225 8.2806 153 -0.06 50
IV.VCEL.EHZ. 2021-01-19T23:46:22.71 0.3 undecidable manual P 93 29.8479 114 0.27 69
IV.RM33.EHZ. 2021-01-19T23:46:21.62 0.1 undecidable manual P 298 24.2535 120 -0.05 97
IV.TERO.HHZ. 2021-01-19T23:46:21.93 0.1 undecidable manual P 24 26.0517 118 0.01 98
IV.CAMP.HHZ. 2021-01-19T23:46:20.65 0.3 undecidable manual P 339 15.2736 136 0.07 74
IV.FAGN.HHZ. 2021-01-19T23:46:20.90 0.1 negative manual P 151 17.9709 130 0.02 99
MN.AQU.HNE. 2021-01-19T23:46:20.00 0.1 undecidable manual P 225 8.2806 153 0.05 100
IV.GIGS.HHN. 2021-01-19T23:46:19.96 0.1 undecidable manual P 57 9.3795 150 -0.07 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHE. ML:0.9 0.0000385 0.42 AML other m 2021-01-19T23:46:25.84
IV.RM33.EHN. ML:1.0 0.0000525 1.62 AML other m 2021-01-19T23:46:25.99
IV.FAGN.HHE. ML:1.9 0.000434 1.72 AML other m 2021-01-19T23:46:26.87
IV.TERO.HHN. ML:1.3 0.00008499999999999999 0.28 AML other m 2021-01-19T23:46:26.35
IV.TERO.HHE. ML:1.4 0.00011015 0.26 AML other m 2021-01-19T23:46:26.38
IV.FAGN.HHN. ML:1.6 0.000217 0.34 AML other m 2021-01-19T23:46:26.86
IV.T0110.HHE. ML:1.3 0.00008255 0.42 AML other m 2021-01-19T23:46:28.23
IV.T0110.HHN. ML:1.3 0.00007829999999999999 0.5 AML other m 2021-01-19T23:46:28.04
IV.VCEL.EHE. ML:1.3 0.00009005000000000001 0.96 AML other m 2021-01-19T23:46:28.48
IV.VCEL.EHN. ML:1.3 0.0000882 0.84 AML other m 2021-01-19T23:46:29.65
IV.NRCA.HHE. ML:1.2 0.0000298 0.14 AML other m 2021-01-19T23:46:36.17
IV.NRCA.HHN. ML:1.1 0.00002255 1.02 AML other m 2021-01-19T23:46:36.09
IV.INTR.HHE. ML:1.1 0.00002675 0.42 AML other m 2021-01-19T23:46:37.59
IV.INTR.HHN. ML:1.2 0.00003345 0.42 AML other m 2021-01-19T23:46:38.62
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