Earthquake with magnitude of ML 1.4 on date 21-09-2021 and time 05:56:24 (UTC) in region 3 km NW L'Aquila (AQ)

A magnitude ML 1.4 earthquake occured in region: 3 km NW L'Aquila (AQ), on

  • 21-09-2021 05:56:24 (UTC)
  • 21-09-2021 07:56:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.378, 13.382 at 12 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
L'Aquila AQ 3 69753 69753
Pizzoli AQ 10 4326 74079
Lucoli AQ 10 1011 75090
Scoppito AQ 10 3727 78817
Barete AQ 12 737 79554
Tornimparte AQ 12 3187 82741
Fossa AQ 13 721 83462
Ocre AQ 13 1167 84629
Poggio Picenze AQ 15 1136 85765
Sant'Eusanio Forconese AQ 15 394 86159
Cagnano Amiterno AQ 16 1369 87528
Capitignano AQ 17 665 88193
Villa Sant'Angelo AQ 18 424 88617
San Demetrio ne' Vestini AQ 18 1854 90471
Rocca di Cambio AQ 18 533 91004
Barisciano AQ 18 1828 92832
Montereale AQ 20 2581 95413
Campotosto AQ 20 542 95955

Municipalities with at least 50000 inhabitants

An earthquake occurred to
3 Km NW of L'Aquila (69753 inhabitants)
41 Km SW of Teramo (54892 inhabitants)
64 Km E of Terni (111501 inhabitants)
65 Km W of Chieti (51815 inhabitants)
65 Km W of Montesilvano (53738 inhabitants)
67 Km NE of Tivoli (56533 inhabitants)
68 Km NE of Guidonia Montecelio (88673 inhabitants)
69 Km W of Pescara (121014 inhabitants)
85 Km SE of Foligno (57155 inhabitants)
92 Km NE of Roma (2864731 inhabitants)
92 Km NE of Velletri (53303 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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 1.4 2021-09-21
05:56:24
42.3785 13.382 12 2021-09-21
06:43:03
Sala Sismica INGV-Roma 95686551
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-21 05:56:24 ± 0.08
Latitude 42.3785 ± 0.0036
Longitude 13.3820 ± 0.0049
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95686551

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 450
Semi-minor axis of confidence ellipse (meter) 164
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 53
Circular confidence region, given by single value of horizontal uncertainty (meter) 450
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 96
Number of associated phases, regardless of their use for origin computation 44
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.97217
Number of stations at which the event was observed 31
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.1
Num. used stations 11
Type of magnitude ML
Reference to an origin 95686551
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-21 06:43:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.GBOS.HHZ. 2021-09-21T05:58:13.95 3.0 undecidable manual Sg 7.05 0
GU.RSP.HHZ. 2021-09-21T05:58:12.41 3.0 undecidable manual Sn -9.99 0
GU.STV.HHZ. 2021-09-21T05:58:10.53 3.0 undecidable manual Sn -4.94 0
GU.ENR.HHZ. 2021-09-21T05:58:10.95 3.0 undecidable manual Sn -2.86 0
IV.SPS2.HHZ. 2021-09-21T05:58:03.97 3.0 undecidable manual Sn -6.16 0
GU.RNCA.HHZ. 2021-09-21T05:57:55.17 3.0 undecidable manual Sg 3.63 0
GU.MGRO.HHZ. 2021-09-21T05:57:55.40 3.0 undecidable manual Sn -9.99 0
IV.PALZ.HHZ. 2021-09-21T05:57:53.20 3.0 undecidable manual Sg 17.799999 0
NI.VINO.HHZ. 2021-09-21T05:57:46.01 3.0 undecidable manual Sn -7.99 0
IV.PTCC.HHZ. 2021-09-21T05:57:43.34 3.0 undecidable manual Sn -9.99 0
IV.MSSA.HHZ. 2021-09-21T05:57:41.47 3.0 undecidable manual Sg 0.39 0
IV.EPZF.HHZ. 2021-09-21T05:57:33.10 3.0 negative manual Pn -0.37 0
IV.SPS2.HHZ. 2021-09-21T05:57:24.40 3.0 negative manual Pn 2.47 0
CH.BERNI.HHZ. 2021-09-21T05:57:15.82 3.0 negative manual Pn -7.15 0
IV.MBAL.EHZ. 2021-09-21T05:57:14.95 3.0 negative manual Pg 4.49 0
IV.ZEN8.EHZ. 2021-09-21T05:57:09.57 3.0 negative manual Pg -0.78 0
IV.MRLC.HHZ. 2021-09-21T05:56:59.81 3.0 negative manual Pn -0.82 0
IV.TST01.HHZ. 2021-09-21T05:56:44.04 3.0 negative manual Pg 1.05 0
IV.EL6.EHZ. 2021-09-21T05:56:42.29 1.0 undecidable manual P 348 0.9722 90 0.18 20
IV.NRCA.HHZ. 2021-09-21T05:56:41.37 0.3 undecidable manual S 337 0.4955 91 0.17 67
IV.PE3.EHZ. 2021-09-21T05:56:40.82 3.0 undecidable manual Sn -9.99 0
IV.CSP1.EHZ. 2021-09-21T05:56:37.98 0.3 undecidable manual P 350 0.7249 91 0.11 65
IV.T0110.HHZ. 2021-09-21T05:56:35.40 0.6 undecidable manual S 117 0.3274 91 -0.81 38
IV.SMA1.EHE. 2021-09-21T05:56:34.35 0.6 undecidable manual S 352 0.2545 92 0.3 46
IV.TERO.HHZ. 2021-09-21T05:56:34.88 0.1 undecidable manual S 34 0.2941 92 -0.34 90
IV.T1299.EHE. 2021-09-21T05:56:34.27 0.6 undecidable manual S 344 0.2662 92 -0.13 48
IV.NRCA.HHZ. 2021-09-21T05:56:33.81 0.1 undecidable manual P 337 0.4955 91 -0.14 91
IV.FAGN.HHZ. 2021-09-21T05:56:32.06 0.3 undecidable manual S 127 0.1871 94 0 74
IV.FIAM.HNE. 2021-09-21T05:56:32.81 0.3 undecidable manual S 241 0.2248 93 -0.36 69
IV.PE3.EHZ. 2021-09-21T05:56:31.21 3.0 positive manual P -7.68 0
IV.RM33.EHZ. 2021-09-21T05:56:31.72 0.3 undecidable manual S 317 0.1799 95 -0.12 73
IV.GIGS.HHE. 2021-09-21T05:56:31.16 0.1 undecidable manual S 62 0.1592 97 -0.08 98
IV.T0110.HHZ. 2021-09-21T05:56:31.60 0.3 undecidable manual P 117 0.3274 91 0.52 65
IV.CAMP.HHE. 2021-09-21T05:56:31.05 0.1 undecidable manual S 7 0.1583 97 -0.17 97
IV.TERO.HHZ. 2021-09-21T05:56:30.59 0.3 positive manual P 34 0.2941 92 0.09 72
IV.T1299.EHE. 2021-09-21T05:56:30.08 0.1 undecidable manual P 344 0.2662 92 0.05 96
IV.FIAM.HNE. 2021-09-21T05:56:29.31 0.3 undecidable manual P 241 0.2248 93 -0.01 74
IV.SMA1.EHE. 2021-09-21T05:56:29.56 0.6 undecidable manual P 352 0.2545 92 -0.26 46
IV.CAMP.HHE. 2021-09-21T05:56:28.38 0.1 undecidable manual P 7 0.1583 97 0.19 96
MN.AQU.HHN. 2021-09-21T05:56:28.11 0.1 undecidable manual S 145 0.0297 160 -0.11 100
IV.FAGN.HHZ. 2021-09-21T05:56:28.77 0.6 undecidable manual P 127 0.1871 94 0.09 49
IV.RM33.EHZ. 2021-09-21T05:56:28.63 0.3 negative manual P 317 0.1799 95 0.08 73
IV.GIGS.HHE. 2021-09-21T05:56:28.48 0.1 undecidable manual P 62 0.1592 97 0.27 95
MN.AQU.HHN. 2021-09-21T05:56:26.77 0.1 undecidable manual P 145 0.0297 160 0.31 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHN. ML:1.4 0.00016924645 0.2176 AML other m 2021-09-21T05:56:32.45
IV.RM33.EHE. ML:1.4 0.00019835145 0.1408 AML other m 2021-09-21T05:56:32.51
IV.FAGN.HHN. ML:1.5 0.00022 0.26 AML other m 2021-09-21T05:56:33.73
IV.FAGN.HHE. ML:1.5 0.0001961323 0.2784 AML other m 2021-09-21T05:56:35.59
IV.NRCA.HHN. ML:1.4 6.095E-5 0.12 AML other m 2021-09-21T05:56:42.83
IV.NRCA.HHE. ML:1.4 6.4941805E-5 0.0992 AML other m 2021-09-21T05:56:42.92
IV.RM33.HNE. ML:1.5 0.000207472715 0.1408 AML other m 2021-09-21T05:56:32.51
IV.RM33.HNN. ML:1.4 0.00019025775 0.2304 AML other m 2021-09-21T05:56:32.44
IV.TERO.HHN. ML:1.3 9.0988275E-5 0.0576 AML other m 2021-09-21T05:56:35.09
IV.TERO.HNE. ML:1.3 9.2007075E-5 0.1504 AML other m 2021-09-21T05:56:37.12
IV.T0110.HHN. ML:1.4 0.000103363895 0.3616 AML other m 2021-09-21T05:56:44.06
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