Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 31-01-2021 and time 09:06:12 (Italy) in region 7 km N Campotosto (AQ)

A magnitude ML 1.1 earthquake occured in region: 7 km N Campotosto (AQ), on

  • 31-01-2021 08:06:12 (UTC)
  • 31-01-2021 09:06:12 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6220, 13.3970 at 6 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 7 542 542
Amatrice RI 9 2657 3199
Cortino TE 9 656 3855
Crognaleto TE 11 1297 5152
Rocca Santa Maria TE 13 537 5689
Capitignano AQ 14 665 6354
Fano Adriano TE 14 296 6650
Accumoli RI 15 667 7317
Valle Castellana TE 15 977 8294
Montereale AQ 16 2581 10875
Acquasanta Terme AP 17 2916 13791
Pietracamela TE 17 271 14062
Arquata del Tronto AP 19 1178 15240
Cittareale RI 19 482 15722
Montorio al Vomano TE 20 8218 23940

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km W of Teramo (54892 inhabitants)
30 Km N of L'Aquila (69753 inhabitants)
62 Km E of Terni (111501 inhabitants)
63 Km W of Montesilvano (53738 inhabitants)
68 Km SE of Foligno (57155 inhabitants)
69 Km W of Pescara (121014 inhabitants)
70 Km W of Chieti (51815 inhabitants)
88 Km NE of Tivoli (56533 inhabitants)
88 Km NE of Guidonia Montecelio (88673 inhabitants)
98 Km SE of Perugia (166134 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 2021-01-31
08:06:12		 42.6217 13.397 6 2021-07-12
16:55:04		 Bollettino Sismico Italiano INGV 88589221
Reviewed
Rev100 		ML 1.1 2021-01-31
08:06:12		 42.6177 13.3897 6 2021-01-31
08:41:36		 Sala Sismica INGV-Roma 86732541
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-31 08:06:12 ± 0.17
Latitude 42.6217 ± 0.0045
Longitude 13.3970 ± 0.0061
Depth (km) 6 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 88589221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 536
Semi-minor axis of confidence ellipse (meter) 205
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 43
Circular confidence region, given by single value of horizontal uncertainty (meter) 540.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
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) 0.04587
Epicentral distance of station farthest from the epicenter (degree) 0.29678
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 88589221
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-29 14:14:11

ML:1.1

Field Value
Value 1.1
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 86732541
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-31 08:41:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NRCA.HHZ. 2021-01-31T08:06:24.10 0.6 undecidable manual S 316 32.9448 101 -0.36 44
IV.RM33.HNE. 2021-01-31T08:06:20.00 0.6 undecidable manual S 230 19.4694 107 0.08 48
IV.GIGS.HHZ. 2021-01-31T08:06:20.80 0.3 undecidable manual S 142 23.5542 105 -0.49 66
IV.TERO.HHZ. 2021-01-31T08:06:19.30 0.6 undecidable manual S 89 16.872 110 0.23 47
IV.NRCA.HHZ. 2021-01-31T08:06:19.13 0.3 undecidable manual P 316 32.9448 101 -0.42 66
IV.MTRA.EHE. 2021-01-31T08:06:18.30 0.6 undecidable manual S 360 14.9739 112 -0.16 48
IV.GIGS.HHZ. 2021-01-31T08:06:17.52 0.3 undecidable manual P 142 23.5542 105 -0.2 70
IV.RM33.HNE. 2021-01-31T08:06:17.34 0.3 undecidable manual P 230 19.4694 107 0.41 67
IV.MTRA.EHE. 2021-01-31T08:06:16.52 0.3 undecidable manual P 360 14.9739 112 0.44 67
IV.CAMP.HHZ. 2021-01-31T08:06:16.80 0.6 undecidable manual S 174 9.5793 123 0.02 50
IV.TERO.HHZ. 2021-01-31T08:06:16.62 0.3 undecidable manual P 89 16.872 110 0.18 71
IV.T1299.HNN. 2021-01-31T08:06:16.80 0.6 undecidable manual S 279 9.4794 123 0.05 49
IV.CAMP.HHZ. 2021-01-31T08:06:15.21 0.1 undecidable manual P 174 9.5793 123 0.09 98
IV.T1299.HNN. 2021-01-31T08:06:15.24 0.3 undecidable manual P 279 9.4794 123 0.14 72
IV.SMA1.EHZ. 2021-01-31T08:06:15.40 0.6 undecidable manual S 281 5.0949 140 -0.21 48
IV.SMA1.EHZ. 2021-01-31T08:06:14.45 0.1 undecidable manual P 281 5.0949 140 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TERO.HHN. ML:1.1 0.000124 0.18 AML other m 2021-01-31T08:06:19.52
IV.TERO.HHE. ML:1.0 0.00010400000000000001 0.08 AML other m 2021-01-31T08:06:19.60
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