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) 42.4090, 13.2700 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

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
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		 42.409 13.2697 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 42.4090 ± 0.0054
Longitude 13.2697 ± 0.0073
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) 620.0
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) 0.00000
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.SERS.HHZ. 2021-01-20T07:44:14.90 3.0 undecidable manual Pn -2.83 0
IV.SARZ.HHZ. 2021-01-20T07:44:14.68 3.0 negative manual Pn -2.34 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.GIGS.HJZ. 2021-01-20T07:43:21.00 0.6 undecidable manual S 79 0.2275 50 0.27 47
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.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.FIAM.HNE. 2021-01-20T07:43:19.44 0.6 undecidable manual S 219 0.1808 118 0.22 48
IV.VCEL.EHZ. 2021-01-20T07:43:19.80 0.1 undecidable manual P 92 0.4218 50 -0.29 90
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.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.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.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 0.00005925 0.28 AML other m 2021-01-20T07:43:17.11
IV.RM33.EHE. ML:0.8 0.00006950000000000001 0.7 AML other m 2021-01-20T07:43:17.81
IV.NRCA.HHE. ML:1.1 0.00003505 0.18 AML other m 2021-01-20T07:43:27.69
IV.NRCA.HHN. ML:1.0 0.00002955 0.58 AML other m 2021-01-20T07:43:28.18
IV.IMOL.HNN. ML:3.8 0.0013700000000000001 0.06 AML other m 2021-01-20T07:44:38.42
IV.IMOL.HNE. ML:4.0 0.0018900000000000002 0.06 AML other m 2021-01-20T07:44:41.92
IV.RM33.HNN. ML:1.0 0.000099103055 1.0176 AML other m 2021-01-20T07:43:17.75
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download