Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 23-02-2021 and time 23:47:49 (Italy) in region 3 km E Campotosto (AQ)

A magnitude ML 1.1 earthquake occured in region: 3 km E Campotosto (AQ), on

  • 23-02-2021 22:47:49 (UTC)
  • 23-02-2021 23:47:49 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.5590, 13.4080 at 14 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Campotosto AQ 3 542 542
Crognaleto TE 6 1297 1839
Capitignano AQ 10 665 2504
Fano Adriano TE 11 296 2800
Cortino TE 11 656 3456
Pietracamela TE 13 271 3727
Amatrice RI 13 2657 6384
Montereale AQ 14 2581 8965
Barete AQ 16 737 9702
Pizzoli AQ 16 4326 14028
Rocca Santa Maria TE 17 537 14565
Montorio al Vomano TE 19 8218 22783
Cagnano Amiterno AQ 19 1369 24152
Tossicia TE 20 1406 25558

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km N of L'Aquila (69753 inhabitants)
27 Km W of Teramo (54892 inhabitants)
61 Km W of Montesilvano (53738 inhabitants)
62 Km E of Terni (111501 inhabitants)
67 Km W of Chieti (51815 inhabitants)
67 Km W of Pescara (121014 inhabitants)
73 Km SE of Foligno (57155 inhabitants)
83 Km NE of Tivoli (56533 inhabitants)
84 Km NE of Guidonia Montecelio (88673 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
Bulletin
Rev1000 		ML 1.1 2021-02-23
22:47:49		 42.559 13.4082 14 2021-07-12
16:55:07		 Bollettino Sismico Italiano INGV 89266961
Reviewed
Rev100 		ML 1.1 2021-02-23
22:47:49		 42.5618 13.4032 15 2021-02-23
22:53:20		 Sala Sismica INGV-Roma 87421121
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-23 22:47:49 ± 0.08
Latitude 42.5590 ± 0.0027
Longitude 13.4082 ± 0.0037
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 89266961

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 292
Semi-minor axis of confidence ellipse (meter) 148
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 59
Circular confidence region, given by single value of horizontal uncertainty (meter) 290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 70
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.02338
Epicentral distance of station farthest from the epicenter (degree) 0.34534
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 89266961
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-19 18:09:36

ML:1.1

Field Value
Value 1.1
Uncertainty 0.1
Num. used stations 12
Type of magnitude ML
Reference to an origin 87421121
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-23 22:53:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MMO1.EHZ. 2021-02-23T22:48:02.82 0.6 undecidable manual S 350 38.3283 97 0.12 46
IV.LNSS.HHZ. 2021-02-23T22:48:00.52 0.3 undecidable manual S 279 30.4473 100 -0.09 71
MN.AQU.HNZ. 2021-02-23T22:47:58.63 0.6 undecidable manual S 181 22.755 106 0.02 48
IV.MTRA.HNZ. 2021-02-23T22:47:58.12 0.6 undecidable manual S 358 21.9669 107 -0.29 46
IV.GIGS.HHZ. 2021-02-23T22:47:57.21 0.3 undecidable manual S 131 17.871 114 -0.18 70
IV.MMO1.EHZ. 2021-02-23T22:47:57.16 0.1 undecidable manual P 350 38.3283 97 -0.17 91
IV.TERO.HHZ. 2021-02-23T22:47:57.25 0.3 undecidable manual S 66 17.4714 114 -0.05 72
IV.LNSS.HHZ. 2021-02-23T22:47:56.07 0.3 undecidable manual P 279 30.4473 100 -0.05 72
IV.RM33.EHZ. 2021-02-23T22:47:56.92 0.1 undecidable manual S 251 16.7721 116 -0.2 95
IV.T1299.HNZ. 2021-02-23T22:47:56.47 0.3 undecidable manual S 309 13.2756 125 0.16 71
IV.SMA1.EHZ. 2021-02-23T22:47:55.52 0.3 undecidable manual S 323 9.879 136 -0.11 73
IV.CAMP.HHZ. 2021-02-23T22:47:54.74 0.1 undecidable manual S 178 2.5974 167 0.05 100
IV.TERO.HHZ. 2021-02-23T22:47:54.26 0.1 undecidable manual P 66 17.4714 114 0.06 97
MN.AQU.HNZ. 2021-02-23T22:47:54.94 0.3 undecidable manual P 181 22.755 106 -0.02 73
IV.MTRA.HNZ. 2021-02-23T22:47:54.76 0.1 undecidable manual P 358 21.9669 107 -0.09 95
IV.RM33.EHZ. 2021-02-23T22:47:54.08 0.1 undecidable manual P 251 16.7721 116 -0.02 98
IV.GIGS.HHZ. 2021-02-23T22:47:54.24 0.1 undecidable manual P 131 17.871 114 -0.01 97
IV.T1299.HNZ. 2021-02-23T22:47:53.84 0.1 undecidable manual P 309 13.2756 125 0.21 94
IV.SMA1.EHZ. 2021-02-23T22:47:53.38 0.1 undecidable manual P 323 9.879 136 0.14 96
IV.CAMP.HHZ. 2021-02-23T22:47:52.92 0.1 undecidable manual P 178 2.5974 167 0.22 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CAMP.HHN. ML:0.9 0.0001005 1.62 AML other m 2021-02-23T22:47:54.87
IV.CAMP.HHE. ML:1.0 0.000134 0.14 AML other m 2021-02-23T22:47:54.90
IV.SMA1.EHN. ML:0.9 0.00007939999999999999 1.42 AML other m 2021-02-23T22:47:55.83
IV.SMA1.EHE. ML:1.0 0.00010325 0.6 AML other m 2021-02-23T22:47:56.61
IV.RM33.EHN. ML:1.1 0.00009235 0.16 AML other m 2021-02-23T22:47:57.18
IV.RM33.EHE. ML:1.3 0.000156 0.22 AML other m 2021-02-23T22:47:57.14
IV.TERO.HHN. ML:1.3 0.00013425 0.28 AML other m 2021-02-23T22:47:57.42
IV.TERO.HHE. ML:1.1 0.000093 0.48 AML other m 2021-02-23T22:47:57.57
IV.LNSS.HHN. ML:1.1 0.00005625 0.34 AML other m 2021-02-23T22:48:00.81
IV.LNSS.HHE. ML:1.2 0.00007465 0.56 AML other m 2021-02-23T22:48:00.84
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