Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 20-01-2021 and time 07:43:11 (UTC) in region 4 km SW Pizzoli (AQ)

A magnitude ML 0.9 earthquake occured in region: 4 km SW Pizzoli (AQ), on

  • 20-01-2021 07:43:11 (UTC)
  • 20-01-2021 08:43:11 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.41, 13.27 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.

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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
Pizzoli AQ 4 4326 4326
Scoppito AQ 4 3727 8053
Barete AQ 5 737 8790
Cagnano Amiterno AQ 7 1369 10159
L'Aquila AQ 12 69753 79912
Capitignano AQ 13 665 80577
Montereale AQ 13 2581 83158
Tornimparte AQ 13 3187 86345
Lucoli AQ 14 1011 87356
Antrodoco RI 16 2588 89944
Borbona RI 16 617 90561
Borgo Velino RI 17 972 91533
Micigliano RI 18 127 91660
Campotosto AQ 19 542 92202
Posta RI 19 694 92896
Castel Sant'Angelo RI 20 1308 94204
Fiamignano RI 20 1413 95617

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km NW of L'Aquila (69753 inhabitants)
45 Km SW of Teramo (54892 inhabitants)
54 Km E of Terni (111501 inhabitants)
63 Km NE of Tivoli (56533 inhabitants)
64 Km NE of Guidonia Montecelio (88673 inhabitants)
73 Km W of Montesilvano (53738 inhabitants)
74 Km W of Chieti (51815 inhabitants)
76 Km SE of Foligno (57155 inhabitants)
78 Km W of Pescara (121014 inhabitants)
86 Km NE of Roma (2864731 inhabitants)
90 Km NE of Velletri (53303 inhabitants)
96 Km E of Viterbo (67173 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 0.9 2021-01-20
07:43:11		 42.41 13.27 11 2021-01-20
08:02:32		 Sala Sismica INGV-Roma 86393701
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-20 07:43:11 ± 0.09
Latitude 42.41 ± 0.01
Longitude 13.27 ± 0.01
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86393701

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 615
Semi-minor axis of confidence ellipse (meter) 498
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 299
Circular confidence region, given by single value of horizontal uncertainty (meter) 620
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 127
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.43977
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 10
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 86393701
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-20 08:02:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.TDS.HHZ. 2021-01-20T07:45:02.16 3.0 undecidable manual Sg 10.08 0
IV.NDIM.HNZ. 2021-01-20T07:44:46.15 3.0 undecidable manual Sg 4.29 0
IV.IMOL.HNZ. 2021-01-20T07:44:22.43 3.0 undecidable manual Sg -0.3 0
CH.BERNI.HHZ. 2021-01-20T07:44:20.58 3.0 undecidable manual Pn -4.19 0
IV.EUCT.HNZ. 2021-01-20T07:44:17.68 3.0 undecidable manual Pn -0.38 0
IV.SARZ.HHZ. 2021-01-20T07:44:14.68 3.0 negative manual Pn -2.34 0
IV.SERS.HHZ. 2021-01-20T07:44:14.90 3.0 undecidable manual Pn -2.83 0
MN.TRI.HHZ. 2021-01-20T07:44:08.16 3.0 negative manual Pg 2.9 0
IV.IMOL.HNZ. 2021-01-20T07:43:48.79 3.0 undecidable manual Pn -3.3 0
IV.RIBO.EHZ.01 2021-01-20T07:43:47.26 3.0 undecidable manual Pg 0.94 0
IV.NRCA.HHZ. 2021-01-20T07:43:26.99 0.6 undecidable manual S 345 0.4398 50 -0.01 47
IV.TERO.HNZ. 2021-01-20T07:43:23.16 0.6 undecidable manual S 49 0.3256 50 -0.48 44
IV.T1299.HNZ. 2021-01-20T07:43:21.41 0.3 undecidable manual S 2 0.2248 50 0.75 61
IV.LNSS.HHN. 2021-01-20T07:43:21.10 0.6 undecidable manual S 319 0.2572 50 -0.5 44
IV.GIGS.HJZ. 2021-01-20T07:43:21.00 0.6 undecidable manual S 79 0.2275 50 0.27 47
IV.NRCA.HHZ. 2021-01-20T07:43:20.36 0.6 undecidable manual P 345 0.4398 50 -0.04 47
IV.SMA1.EHZ. 2021-01-20T07:43:20.75 0.6 undecidable manual S 12 0.2266 50 0.06 49
IV.VCEL.EHZ. 2021-01-20T07:43:19.80 0.1 undecidable manual P 92 0.4218 50 -0.29 90
IV.FIAM.HNE. 2021-01-20T07:43:19.44 0.6 undecidable manual S 219 0.1808 118 0.22 48
IV.TERO.HNZ. 2021-01-20T07:43:18.14 0.3 undecidable manual P 49 0.3256 50 -0.32 68
IV.CAMP.HHZ. 2021-01-20T07:43:18.72 0.6 undecidable manual S 39 0.1628 120 0.09 49
IV.LNSS.HHN. 2021-01-20T07:43:17.39 0.1 undecidable manual P 319 0.2572 50 0.11 96
IV.SMA1.EHZ. 2021-01-20T07:43:16.65 0.1 undecidable manual P 12 0.2266 50 -0.11 97
IV.GIGS.HJZ. 2021-01-20T07:43:16.92 0.1 undecidable manual P 79 0.2275 50 0.14 96
IV.T1299.HNZ. 2021-01-20T07:43:16.85 0.6 undecidable manual P 2 0.2248 50 0.11 48
IV.RM33.EHZ. 2021-01-20T07:43:16.46 0.6 undecidable manual S 338 0.1079 131 -0.44 46
IV.CAMP.HHZ. 2021-01-20T07:43:15.73 0.1 undecidable manual P 39 0.1628 120 0.16 97
IV.FIAM.HNE. 2021-01-20T07:43:15.91 0.1 undecidable manual P 219 0.1808 118 0 100
IV.RM33.EHZ. 2021-01-20T07:43:14.64 0.6 undecidable manual P 338 0.1079 131 0.07 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHN. ML:0.7 5.925E-5 0.28 AML other m 2021-01-20T07:43:17.11
IV.RM33.EHE. ML:0.8 6.95E-5 0.7 AML other m 2021-01-20T07:43:17.81
IV.NRCA.HHE. ML:1.1 3.505E-5 0.18 AML other m 2021-01-20T07:43:27.69
IV.NRCA.HHN. ML:1 2.955E-5 0.58 AML other m 2021-01-20T07:43:28.18
IV.IMOL.HNN. ML:3.8 0.00137 0.06 AML other m 2021-01-20T07:44:38.42
IV.IMOL.HNE. ML:4 0.00189 0.06 AML other m 2021-01-20T07:44:41.92
IV.RM33.HNN. ML:1 9.9103055E-5 1.0176 AML other m 2021-01-20T07:43:17.75
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