Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 07-04-2021 and time 14:43:26 (Italy) in region 3 km SE Cittareale (RI)

A magnitude ML 1.4 earthquake occured in region: 3 km SE Cittareale (RI), on

  • 07-04-2021 12:43:26 (UTC)
  • 07-04-2021 14:43:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.5970, 13.1880 at 15 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
Cittareale RI 3 482 482
Amatrice RI 9 2657 3139
Montereale AQ 9 2581 5720
Borbona RI 10 617 6337
Posta RI 11 694 7031
Accumoli RI 12 667 7698
Capitignano AQ 13 665 8363
Campotosto AQ 16 542 8905
Cagnano Amiterno AQ 16 1369 10274
Barete AQ 18 737 11011
Leonessa RI 19 2435 13446
Micigliano RI 20 127 13573
Cascia PG 20 3217 16790
Pizzoli AQ 20 4326 21116

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km NW of L'Aquila (69753 inhabitants)
43 Km W of Teramo (54892 inhabitants)
44 Km E of Terni (111501 inhabitants)
56 Km SE of Foligno (57155 inhabitants)
76 Km NE of Guidonia Montecelio (88673 inhabitants)
77 Km NE of Tivoli (56533 inhabitants)
79 Km W of Montesilvano (53738 inhabitants)
85 Km W of Chieti (51815 inhabitants)
85 Km W of Pescara (121014 inhabitants)
86 Km SE of Perugia (166134 inhabitants)
91 Km E of Viterbo (67173 inhabitants)
97 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
Reviewed
Rev100 		ML 1.4 2021-04-07
12:43:26		 42.5973 13.1883 15 2021-04-07
13:02:13		 Sala Sismica INGV-Roma 88885491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-07 12:43:26 ± 0.12
Latitude 42.5973 ± 0.0063
Longitude 13.1883 ± 0.0049
Depth (km) 15 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 88885491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 508
Semi-minor axis of confidence ellipse (meter) 491
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 358
Circular confidence region, given by single value of horizontal uncertainty (meter) 510.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 105
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.31836
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 88885491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-07 13:02:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MMO1.EHZ. 2021-04-07T12:43:38.32 0.1 undecidable manual S 19 35.3424 100 0.03 96
IV.MC2.EHZ. 2021-04-07T12:43:37.73 3.0 undecidable manual S -1.35 0
IV.TERO.HHZ. 2021-04-07T12:43:37.69 0.1 undecidable manual S 85 34.0437 101 -0.26 92
IV.GAVE.EHZ. 2021-04-07T12:43:35.73 0.1 undecidable manual S 294 26.1516 106 -0.18 95
IV.TERO.HHZ. 2021-04-07T12:43:33.01 0.1 undecidable manual P 85 34.0437 101 -0.02 96
IV.MMO1.EHZ. 2021-04-07T12:43:33.16 0.1 undecidable manual P 19 35.3424 100 -0.07 95
IV.RM33.EHZ. 2021-04-07T12:43:32.04 0.1 undecidable manual S 168 10.0788 139 -0.15 98
IV.LNSS.HHZ. 2021-04-07T12:43:32.43 0.1 undecidable manual S 273 12.0768 132 -0.14 98
IV.SMA1.EHZ. 2021-04-07T12:43:32.68 0.1 undecidable manual S 73 12.5763 131 0.02 100
IV.GAVE.EHZ. 2021-04-07T12:43:31.91 0.1 undecidable manual P 294 26.1516 106 0.06 97
IV.SMA1.EHZ. 2021-04-07T12:43:30.29 0.1 undecidable manual P 73 12.5763 131 0.31 94
IV.LNSS.HHZ. 2021-04-07T12:43:30.07 0.1 undecidable manual P 273 12.0768 132 0.14 98
IV.RM33.EHZ. 2021-04-07T12:43:29.94 0.1 undecidable manual P 168 10.0788 139 0.24 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHN. ML:1.4 0.00026749999999999994 0.26 AML other m 2021-04-07T12:43:32.19
IV.RM33.EHE. ML:1.4 0.0002475 0.18 AML other m 2021-04-07T12:43:32.41
IV.LNSS.HHN. ML:1.4 0.000245 0.28 AML other m 2021-04-07T12:43:32.74
IV.LNSS.HHE. ML:1.8 0.0006035 0.14 AML other m 2021-04-07T12:43:32.69
IV.SMA1.EHE. ML:1.7 0.00040249999999999997 0.46 AML other m 2021-04-07T12:43:33.11
IV.SMA1.EHN. ML:1.3 0.000185 1.04 AML other m 2021-04-07T12:43:33.89
IV.TERO.HHE. ML:1.0 0.0000391 1.24 AML other m 2021-04-07T12:43:37.96
IV.TERO.HHN. ML:1.1 0.000047799999999999996 0.68 AML other m 2021-04-07T12:43:38.99
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