Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 21-01-2021 and time 04:02:55 (UTC) in region 1 km W Pizzoli (AQ)

A magnitude ML 1.2 earthquake occured in region: 1 km W Pizzoli (AQ), on

  • 21-01-2021 04:02:55 (UTC)
  • 21-01-2021 05:02:55 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.44, 13.28 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.

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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 1 4326 4326
Barete AQ 2 737 5063
Cagnano Amiterno AQ 5 1369 6432
Scoppito AQ 7 3727 10159
Capitignano AQ 10 665 10824
Montereale AQ 10 2581 13405
L'Aquila AQ 14 69753 83158
Borbona RI 15 617 83775
Campotosto AQ 16 542 84317
Tornimparte AQ 16 3187 87504
Antrodoco RI 16 2588 90092
Lucoli AQ 17 1011 91103
Posta RI 18 694 91797
Borgo Velino RI 18 972 92769
Micigliano RI 19 127 92896

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km NW of L'Aquila (69753 inhabitants)
43 Km SW of Teramo (54892 inhabitants)
54 Km E of Terni (111501 inhabitants)
66 Km NE of Tivoli (56533 inhabitants)
66 Km NE of Guidonia Montecelio (88673 inhabitants)
72 Km W of Montesilvano (53738 inhabitants)
74 Km W of Chieti (51815 inhabitants)
75 Km SE of Foligno (57155 inhabitants)
77 Km W of Pescara (121014 inhabitants)
89 Km NE of Roma (2864731 inhabitants)
93 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 1.2 2021-01-21
04:02:55		 42.44 13.28 12 2021-01-21
04:09:41		 Sala Sismica INGV-Roma 86419971
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-21 04:02:55 ± 0.24
Latitude 42.44 ± 0.01
Longitude 13.28 ± 0.01
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 86419971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 969
Semi-minor axis of confidence ellipse (meter) 738
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 180
Circular confidence region, given by single value of horizontal uncertainty (meter) 970
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 300
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 10
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
Epicentral distance of station farthest from the epicenter (degree) 0.41639
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 86419971
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-21 04:09:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.IFIL.HHZ. 2021-01-21T04:04:19.33 3.0 undecidable manual Sn -3.17 0
IV.MTRZ.HNZ. 2021-01-21T04:04:15.93 3.0 undecidable manual Sg 6.46 0
IV.BOZZ.EHZ. 2021-01-21T04:03:56.85 3.0 positive manual Pg 10.12 0
IV.RIBO.EHZ.01 2021-01-21T04:03:51.62 3.0 undecidable manual Sn -1 0
IV.CPGN.EHZ. 2021-01-21T04:03:50.16 3.0 undecidable manual Sn -0.27 0
IV.BARO.EHZ. 2021-01-21T04:03:10.47 3.0 undecidable manual P 0.41 0
IV.NRCA.HHZ. 2021-01-21T04:03:10.22 0.6 undecidable manual S 343 0.4164 92 -0.14 46
IV.GAVE.EHZ. 2021-01-21T04:03:09.56 0.3 undecidable manual S 312 0.3831 92 0.19 70
IV.LNSS.HHZ. 2021-01-21T04:03:05.15 0.3 undecidable manual S 314 0.2428 95 -0.1 71
IV.SMA1.EHZ. 2021-01-21T04:03:04.15 0.3 undecidable manual S 12 0.1988 97 0.2 71
IV.GAVE.EHZ. 2021-01-21T04:03:03.54 1.0 undecidable manual P 312 0.3831 92 0 23
IV.NRCA.HHZ. 2021-01-21T04:03:03.88 0.1 undecidable manual P 343 0.4164 92 -0.23 89
IV.PTRJ.HNZ. 2021-01-21T04:03:02.77 3.0 undecidable manual P -0.08 0
IV.LNSS.HHZ. 2021-01-21T04:03:01.11 0.1 undecidable manual P 314 0.2428 95 -0.05 95
IV.SMA1.EHZ. 2021-01-21T04:03:00.50 0.3 positive manual P 12 0.1988 97 0.09 74
IV.RM33.EHZ. 2021-01-21T04:03:00.67 0.6 undecidable manual S 327 0.0881 129 -0.2 48
IV.RM33.EHZ. 2021-01-21T04:02:58.78 0.1 negative manual P 327 0.0881 129 0.15 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHN. ML:1.2 0.0001975 0.26 AML other m 2021-01-21T04:03:00.85
IV.RM33.EHE. ML:1.1 0.0001385 0.74 AML other m 2021-01-21T04:03:01.98
IV.SMA1.EHN. ML:1.6 0.00028 0.3 AML other m 2021-01-21T04:03:04.38
IV.SMA1.EHE. ML:1.7 0.000319 0.26 AML other m 2021-01-21T04:03:04.41
IV.PTRJ.HHN. ML:3.5 0.001455 0.96 AML other m 2021-01-21T04:03:05.20
IV.PTRJ.HNN. ML:3.5 0.001515 0.94 AML other m 2021-01-21T04:03:05.20
IV.PTRJ.HHE. ML:2.8 0.0003105 0.34 AML other m 2021-01-21T04:03:05.31
IV.LNSS.HHN. ML:1 5.645E-5 0.46 AML other m 2021-01-21T04:03:05.53
IV.LNSS.HHE. ML:1 4.77E-5 0.58 AML other m 2021-01-21T04:03:07.60
IV.NRCA.HHE. ML:1.3 5.8E-5 0.52 AML other m 2021-01-21T04:03:11.48
IV.NRCA.HHN. ML:1 3.0E-5 1.22 AML other m 2021-01-21T04:03:12.28
IV.CPGN.HNN. ML:3.5 0.0014025 0.4 AML other m 2021-01-21T04:03:24.01
IV.CPGN.HNE. ML:3.4 0.0010115 0.72 AML other m 2021-01-21T04:03:24.07
IV.CPGN.EHE. ML:2.4 0.00010632 0.42 AML other m 2021-01-21T04:03:24.67
IV.CPGN.EHN. ML:2.8 0.000243 1.58 AML other m 2021-01-21T04:03:25.97
IV.PTRJ.HNE. ML:3.2 0.000705 0.96 AML other m 2021-01-21T04:03:40.30
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