Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 31-05-2021 and time 08:04:55 (Italy) in region 4 km SW Cortino (TE)

A magnitude ML 1.7 earthquake occured in region: 4 km SW Cortino (TE), on

  • 31-05-2021 06:04:55 (UTC)
  • 31-05-2021 08:04:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.5970, 13.4750 at 13 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
Cortino TE 4 656 656
Crognaleto TE 5 1297 1953
Fano Adriano TE 7 296 2249
Campotosto AQ 10 542 2791
Pietracamela TE 10 271 3062
Rocca Santa Maria TE 11 537 3599
Montorio al Vomano TE 13 8218 11817
Tossicia TE 15 1406 13223
Valle Castellana TE 16 977 14200
Amatrice RI 16 2657 16857
Torricella Sicura TE 16 2641 19498
Capitignano AQ 17 665 20163
Colledara TE 18 2179 22342
Isola del Gran Sasso d'Italia TE 19 4773 27115
Acquasanta Terme AP 20 2916 30031

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km W of Teramo (54892 inhabitants)
28 Km N of L'Aquila (69753 inhabitants)
56 Km W of Montesilvano (53738 inhabitants)
62 Km W of Pescara (121014 inhabitants)
63 Km W of Chieti (51815 inhabitants)
68 Km E of Terni (111501 inhabitants)
75 Km SE of Foligno (57155 inhabitants)
90 Km NE of Tivoli (56533 inhabitants)
90 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 1.7 2021-05-31
06:04:55		 42.5967 13.4753 13 2021-12-29
11:12:05		 Bollettino Sismico Italiano INGV 91393451
Reviewed
Rev100 		ML 1.7 2021-05-31
06:04:55		 42.6015 13.464 11 2021-05-31
06:18:41		 Sala Sismica INGV-Roma 90653011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-31 06:04:55 ± 0.07
Latitude 42.5967 ± 0.0036
Longitude 13.4753 ± 0.0049
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91393451

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 427
Semi-minor axis of confidence ellipse (meter) 243
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 87
Circular confidence region, given by single value of horizontal uncertainty (meter) 430.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 66
Number of associated phases, regardless of their use for origin computation 37
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.53330
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 24
Type of magnitude ML
Reference to an origin 91393451
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-14 09:48:32

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 23
Type of magnitude ML
Reference to an origin 90653011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-31 06:18:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BRSN.HNZ. 2021-05-31T06:05:50.90 3.0 undecidable manual Sg 3.92 0
IV.PTRJ.HNZ. 2021-05-31T06:05:22.83 3.0 undecidable manual Pn 0.82 0
IV.VVLD.HHZ. 2021-05-31T06:05:20.82 3.0 undecidable manual Sg -5.46 0
IV.ATMI.HHZ. 2021-05-31T06:05:14.91 3.0 undecidable manual P 1.81 0
IV.FDMO.HHZ. 2021-05-31T06:05:14.16 0.3 undecidable manual S 327 58.0974 92 0.24 66
IV.CSP1.EHZ. 2021-05-31T06:05:14.77 0.3 undecidable manual S 338 59.1963 92 0.57 60
IV.T0110.HHZ. 2021-05-31T06:05:11.31 0.3 undecidable manual S 149 47.619 93 0.19 68
IV.MF5.EHZ. 2021-05-31T06:05:10.86 0.6 undecidable manual S 358 43.4232 94 0.86 36
IV.MC2.EHZ. 2021-05-31T06:05:09.93 0.3 undecidable manual S 326 42.0246 94 0.31 67
IV.LNSS.HHZ. 2021-05-31T06:05:08.02 0.3 undecidable manual S 271 35.5422 95 0.12 71
IV.NRCA.HHZ. 2021-05-31T06:05:08.79 0.3 undecidable manual S 312 39.4272 94 -0.16 70
IV.VCEL.EHZ. 2021-05-31T06:05:08.87 0.3 undecidable manual S 127 37.3293 94 0.48 65
IV.MMO1.EHZ. 2021-05-31T06:05:07.82 0.3 undecidable manual S 340 35.742 95 -0.12 71
IV.FDMO.HHZ. 2021-05-31T06:05:06.06 0.1 undecidable manual P 327 58.0974 92 -0.26 88
IV.CSP1.EHZ. 2021-05-31T06:05:06.30 0.1 undecidable manual P 338 59.1963 92 -0.18 90
IV.MF5.EHZ. 2021-05-31T06:05:04.11 0.1 undecidable manual P 358 43.4232 94 0.05 94
IV.OFFI.HHZ. 2021-05-31T06:05:04.30 0.3 undecidable manual P 24 41.2254 94 0.57 62
IV.RM33.EHZ. 2021-05-31T06:05:04.66 0.3 undecidable manual S 246 23.4543 100 -0.03 73
IV.T0110.HHZ. 2021-05-31T06:05:04.43 0.3 undecidable manual P 149 47.619 93 -0.27 67
IV.NRCA.HHZ. 2021-05-31T06:05:03.14 0.1 undecidable manual P 312 39.4272 94 -0.31 90
IV.T1299.EHZ. 2021-05-31T06:05:03.18 0.3 undecidable manual S 285 16.2726 111 0.32 70
IV.MC2.EHZ. 2021-05-31T06:05:03.66 0.3 undecidable manual P 326 42.0246 94 -0.18 69
IV.VCEL.EHZ. 2021-05-31T06:05:03.13 0.1 undecidable manual P 127 37.3293 94 0.01 96
IV.MMO1.EHZ. 2021-05-31T06:05:02.63 0.3 undecidable manual P 340 35.742 95 -0.24 69
IV.MTRA.EHZ. 2021-05-31T06:05:02.99 0.3 undecidable manual S 340 18.87 106 -0.52 67
IV.GIGS.HJZ. 2021-05-31T06:05:02.91 0.3 undecidable manual S 153 17.7711 108 -0.32 70
IV.LNSS.HHZ. 2021-05-31T06:05:02.72 0.3 undecidable manual P 271 35.5422 95 -0.12 71
IV.TERO.HNZ. 2021-05-31T06:05:01.32 0.3 undecidable manual S 74 10.878 128 -0.27 71
IV.CAMP.HHZ. 2021-05-31T06:05:01.42 0.3 undecidable manual S 219 8.6802 137 0.27 73
IV.SMA1.EHZ. 2021-05-31T06:05:01.59 0.3 undecidable manual S 288 12.0768 124 -0.25 71
IV.MTRA.EHZ. 2021-05-31T06:05:00.11 0.1 undecidable manual P 340 18.87 106 -0.2 96
IV.GIGS.HJZ. 2021-05-31T06:05:00.00 0.1 undecidable manual P 153 17.7711 108 -0.15 96
IV.RM33.EHZ. 2021-05-31T06:05:00.93 0.3 undecidable manual P 246 23.4543 100 -0.06 73
IV.T1299.EHZ. 2021-05-31T06:05:00.12 0.1 undecidable manual P 285 16.2726 111 0.19 96
IV.CAMP.HHZ. 2021-05-31T06:04:59.21 0.3 undecidable manual P 219 8.6802 137 0.26 72
IV.SMA1.EHZ. 2021-05-31T06:04:59.44 0.1 undecidable manual P 288 12.0768 124 0.09 99
IV.TERO.HNZ. 2021-05-31T06:04:59.17 0.1 negative manual P 74 10.878 128 -0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TERO.HHN. ML:2.2 0.001563 0.18 AML other m 2021-05-31T06:05:01.58
IV.CAMP.HHN. ML:1.5 0.00038449999999999997 0.4 AML other m 2021-05-31T06:05:01.58
IV.CAMP.HHE. ML:1.4 0.00029200000000000005 0.12 AML other m 2021-05-31T06:05:01.54
IV.TERO.HHE. ML:2.0 0.0011949999999999999 0.18 AML other m 2021-05-31T06:05:01.57
IV.SMA1.EHE. ML:1.6 0.00038500000000000003 0.18 AML other m 2021-05-31T06:05:02.29
IV.SMA1.EHN. ML:1.4 0.0002755 0.6 AML other m 2021-05-31T06:05:02.48
IV.MTRA.HNN. ML:1.7 0.00034750000000000004 0.46 AML other m 2021-05-31T06:05:03.24
IV.MTRA.EHN. ML:1.7 0.0003465 0.46 AML other m 2021-05-31T06:05:03.24
IV.MTRA.HNE. ML:1.7 0.000375 1.56 AML other m 2021-05-31T06:05:03.79
IV.MTRA.EHE. ML:1.7 0.00033499999999999996 1.58 AML other m 2021-05-31T06:05:03.01
IV.RM33.EHN. ML:1.6 0.000254 1.72 AML other m 2021-05-31T06:05:04.03
IV.RM33.EHE. ML:1.6 0.000211 0.6 AML other m 2021-05-31T06:05:05.04
IV.NRCA.HHE. ML:2.0 0.0003415 0.16 AML other m 2021-05-31T06:05:09.17
IV.NRCA.HHN. ML:1.8 0.000216 0.1 AML other m 2021-05-31T06:05:09.29
IV.LNSS.HHE. ML:1.6 0.00016499999999999997 0.1 AML other m 2021-05-31T06:05:09.65
IV.LNSS.HHN. ML:1.6 0.000154 0.42 AML other m 2021-05-31T06:05:09.72
IV.VCEL.EHN. ML:1.9 0.00027800000000000004 0.6 AML other m 2021-05-31T06:05:10.13
IV.FAGN.HHN. ML:1.6 0.00013000000000000002 0.38 AML other m 2021-05-31T06:05:10.87
IV.VCEL.EHE. ML:1.9 0.000286 1.04 AML other m 2021-05-31T06:05:11.30
IV.T0110.HHE. ML:1.9 0.000213 1.48 AML other m 2021-05-31T06:05:12.89
IV.T0110.HHN. ML:2.0 0.0002485 1.6 AML other m 2021-05-31T06:05:12.15
IV.FAGN.HHE. ML:1.6 0.0001505 0.22 AML other m 2021-05-31T06:05:12.72
IV.FDMO.HHN. ML:2.2 0.0003265 0.26 AML other m 2021-05-31T06:05:14.47
IV.FDMO.HHE. ML:1.8 0.000128 0.72 AML other m 2021-05-31T06:05:14.49
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